[Solved] After 4 years access ex trying to cut me off

Hi everyone great info here have just found this forum whilst googling my current woes.

This is how it stands. just under 4 years ago i split from my ex we had a 5 month old. She lived next door to me for the first 18months and we shared care for the child. I have had 50-50 (or just under so she can keep her benefits) since then up until our child started school this jan. I have always paid child support and i pay much more than i should as she used things like nursery to bump it up knowing that it looks bad to reduce payments and that i wouldnt risk it.

Now for the most part things have been amicable, but she has a complete obsession with alcohol being a terrible thing, me being an alcoholic, me being violent and dangerous. Something that completely baffles anyone who knows me. She tells everyone she can that i cannot be allowed a drink she has people look for me in local pubs (where she has many friends) and even in the most recent case, has plastered my pictures all over public webpages in an effort to find evidence that i have had anything to drink, anywhere.

Now i reiterate, i am not some recovering alcoholic, i am just an ordinary man who would certainly have a casual drink but would certainly not be drunk in charge of a child, i am barely ever what you would call "drunk".

So custody has been ongoing (one full weekend one half weekend, with more leeway in school hols) when with me she lives with myself and my partner and her little boy whom is there 50% of the time in a similar arrangment. She is in a great environment. So what has happened? Well recently we took her, my partner and i, on a weekend break, with agreement from the mother. During the trip my daughter told me that i wasnt allowed coffee or id get drunk and the police would take me away. I raised an eyebrow as this seemed a deliberately seeded statement, i drink a lot of coffee what can i say, the ex would know that i would be seen or say i was having coffee...thus drunk....etc

But i ignored it largely and we had a great weekend. I returned her to school and her mother collected her. I then get messages accusing me of being drunk all weekend. Our child clearly giving a solid report on things. Again ill reiterate this wasnt true and at no time was i drunk. The only reports that i was come from the child. Who is very young. So now the mother is appealing all over social media for witnesses, calling up the place we stayed requesting surveillance footage and statements from staff. Again, not to see if i was stumbling about drunk or anything, no, just whether i was ever seen holding a drink, served a drink or had a drink.

She is currently stating that if she finds "evidence" of this that all contact will cease, so obviously i have had to begin investigating my options, should she decide to follow through. Though i do not believe she truly cares about the validity of whatever evidence she can locate. She is also stating that as my partner is refusing to speak to her she is complicit in the lies and will not be allowed contact ever.

What recommendations can anyone give? Apart from her completely abnormal attitude to alcohol, she is largely sane. But that said she uses the alcohol argument to control whatever she pleases, i cant take my child to a relatives if they are known to drink, cant leave her with anyone who drinks at all (and i mean drinks ever, not drinks in the time they are caring for a child).

She also has said many times in the past that if i try to take her to court i will have all access cut, that she will attempt to accuse me of DV, of violence to the child, of drug abuse and obviously alcohol abuse. None of which are true.

Ideas? opinions? options?