Have had problems with XP and his g/f before, but it's reached a whole new level.
I'll try to keep it brief. 
Court order in place which says XP has access every other weekend, contact between us to be via text message or mobile phone conversation.
XP brings his g/f and g/f's DS to every drop off/pick up.
Just before the last contact, my solicitor wrote to me enclosing 2 letters XP's g/f has written on behalf of XP, asking my solicitor to demand I arrange for DD to have glasses immediately (letter says I am refusing to arrange for DD to be fitted with glasses which is complete rubbish.)
The other letter was to tell solicitor to demand I use words XP and his g/f deem appropriate for g/f's DS to overhear, since XP, his g/f and g/f's DS find my choice of language inappropriate and foul. no mention which words they are referring to.
My solicitor says she is not concerned with these letters, and has sent XP a reply stating that she is in the process of costing and closing my case.
Upon contact, XP asked if I had heard from my solicitor. I said I had. XP asked me what I thought of their requests. I said Rubbish!!
At this point, XP strapped DD into g/f's car and then shouted out of the window that he was never bringing DD back. (He has abducted her once before.)
I texted him asking if he intended upon returning DD, no response. I texted again a couple of hrs later. Again, no response.
I phoned his mobile that evening, he said he would let me know when he was ready. 
I redialled his mobile twice, and both times, his g/f answered and wouldn't say anything other than XP is busy and will call back when he is good and ready!!!
XP left it until the following day to tell me he would drop DD off when the weather improved. 
He dropped DD back today. (I didn't notice a vast improvement in the weather between today and yesterday tbh).
In DD's bag was a letter, again written by XP's g/f, stating that XP will no longer respond to texts or phonecalls regarding any matter to do with DD, and instead will put everything in writing and expects anything I want/need to say to be in writing too.
How can this work???? If I am to write down in a letter everything that may need to be said??
XP has signed the letters his g/f has written as if they are from him.
Apparently, according to the letter in DD's bag, there are another 2 letters they have sent to my solicitor which I haven't received yet.
I feel so angry, and feel like agreeing to their ridiculous demands, just to prove how totally ridiculous they are.
Have had lots of problems with XP and his g/f, and this is just the latest in a long line. They have written to SS, my Dr, DD's HV, now my solicitor. XP claims he wants residency and his g/f is supporting him in his quest wholeheartedly. I have at least 2 meetings/assessments every week at moment to be questioned/have DD assessed due to various rubbish allegations XP and his g/f are making. None of their allegations so far have been substantiated.
Now, I don't want to take DD for drop off/pick ups anymore.
Any advice? WWYD?