Poor service

I have sent multiple requests since the last week in July, to reverse debit orders that's gone off my account twice, but only one of this has been reversed. I have emailed my private banker, and his colleague, when he was on leave, even the Private clients email, no one has contacted me, and its almost a full month that I have requested these debits to be reversed and stopped. I was advises the TAT for debit order disputes are 7-14 days. It's almost a month?