Account suspended, and after 3 days and 5 calls to the call centre nobodybis able to help me.

I downgraded from a 10mg line to a 4 mg line on Wednesday. I work from home so it's crucial that I have internet. On Friday my internet went off. I phoned the call centre and was told to wait a day. I phoned again to find out exactly what is wrong and was told my account was suspended and I should wait a day (ref number ********** ) I phoned again on Sunday (ref number ********** ) and was told to be patient and they can't tell me when it will be fixed. I phoned again and asked to speak to a manager. They asked for my number so the manager can phone me back after he is done with a client - 4 hours later and I'm still waiting.