Can anyone offer advice?

Adwords account cancelled with no explanation

[emmab]

I logged into my adwords account of 3 months to find one of the red boxes at the top announcing 'this account has been cancelled on August 15th. It will not be possible to reactivate your account'

No explanation email as to why this might be so and ad groups are still all active. I have sent an email to customer support awaiting reply but has anyone else encountered this before?

I'm hoping it might be something to do with the fact I applied for a full service account which might now be coming into effect. Its certainly scary, how can I explain to a client that Google has cancelled their ads for no reason.

[emmab]

Google are saying it is because they have had a chargeback, although our accounts prove otherwise and the bank is adamant that this is not the case. Has this happened to anyone before? Can they get the accounts mixed up?

[Boesman]

I have found that they regularly screw up my payments and blame my bank or lack of funds when this is not the case. I think they must have huge automated systems that sometimes cause havoc. I just keep entering my card details and then, voila! it goes through and I am live again. They will have to do something about their customer service, bacause it sucks.