Brief background: ex was violent and abusive, had minimal interest in the DC when living with them. We fled 9 years ago. Contact has been sparse since, averaging once a year by ex's request. A case for contact has been going through the court for a year now and is likely to continue for at least another year. DC are uninterested in seeing or speaking to their father after giving him multiple chances and being let down, but (grudgingly) agreed to phone contact and occasional visits to maintain some sort of relationship for the future. All my communication with my ex is done via text message due to past abuse over the phone.
In the past couple of months I have been inundated with letters from ex's solicitors, 9 in 2.5 months, about petty, minor issues or making false allegations. It has reached the point that every other time the DC talk to their father, he tells them he is going to his solicitor to make me do XYZ that he has demanded the previous week and been told no. If there hasn't been an unreasonable demand to complain about, I am getting letters that flat out invent things such as ex not ringing at the appointed time for contact then claiming I cancelled the call, or swore at him and hung up before he could speak to the DC. I can prove that the allegations are rubbish as my call log shows no attempts made so I'm not concerned at the threat of being taken to court for breach of the contact order.
All this is costing me a fortune in solicitors fees for receiving and replying to the letters, although this is preferable to the panic I used to feel every time there was a white envelope in with the post, in case it was another letter full of crap I had to deal with. To date, none of the letters which were about contact were actually true or necessary and the others were not at all something that would require going through a solicitor, so I have had 9 letters in 10 weeks, comprising some 250 lines between them for no good reason at all. All were designed to bully me into agreeing to something ex wanted or to generally upset or worry me.
Is there any way I can stop all the letters, would this count as harassment enough for a non-mol order given that I do not see ex in person due to distance, so it is only text or letters or messages he passes through the DC so I am not in any urgent physical danger?