VERY BAD SERVICE

I have had a contract with Mobiles plus for some time now and have never really had too many problems with them apart from being dragged into it in the beginning and not being able to get out of it because of \Contractual obligations". I sent through a request for my bank details to be changed 3 months ago and it has still not been done. Due to the debit order not going through the closed bank account they have blocked my sim card without any prior warning and I am now left without any contact numbers. After calling the call center many times and being cut off each time"