Accumulated bank charges because of returned debit orders.

I did not sign a contract with Rain. It was a month to month deduction of my 4G Sim.

They debit in advance, if you don't pay you don't get data. I did not have funds last month, I then requested Rain to stop debiting my account. They did not, they keep on trying to debit and this have accumulated a lot of bank charges.

The same thing this month, now I have again accumulated over almost 6 unpaid debit order charges.

Please stop debiting my account and cancel this 4G.