BAD SERVICE!!!

I have taken out a contract at the end of March and returned handset within my 14 days window period. I am been billed for something I don't have and when I contact the call centre and go and see them I am sent from pillar to post. On Friday 29 May I was told my credit refund is due but without banking details they can not pay.<br> Well nobody bother to contact me to tell me that. Since I have sent same to [Email Removed] but to date no one have even read my emails and when I phone I am told they have not received my attachments. I have sent a number of copies already but still not read. Its bad how they can take your money but when they have to refund you there always seems to be problems and no communication what so ever. Communication is very important I would appreciate it if this time someone will take the time to call me for change!!!!<br>