I have been a customer for the last 5 years. I upgraded my sim only deal to increase the amount of data that I receive. The sim in my phone stopped working as I was incorrectly sent a new one in the post. In order for me to use my phone I had to buy a replacement sim for £5 and waste my time going to two car phone warehouses. The data that should have been rolled over was 20gb, this has not been rolled over!!! Extremely annoyed and disappointed!!!