In which case keeping a strong hold on your emotions is absolutely essential. If you get upset and emotional you are playing in to the hands of the child's father and grandmother, who will do all they can to wind you up and then use your behaviour as a reason the child must stay in the fathers family.
You and your daaughter should avoid all contact with the family while continuing to show love and interest in the child. This can be done by sending clothes books, little things on a regular basis and then getting a good solicitor, specialising in this kind of work or visit your local Citizen's Advice bureau.
In a situation like this, you need to take deep breath, stay cool and calm and deal with this carefully and with legal support. Not easy i know, but it is the only way forward.
I find it very odd that the courts are ignoring all texts. Have you got the right phone number. Do they have a system for responding to texts. Did they give you this number and tell you to use it or is it just one you had at a previous stage in the proceedings, so it is not relevant to the situation you are now in. is it a number that can onlky send not receive messages?