terrible service

in my opinion this is the worse bank ever and I will be changing banks as this is not my first incident. I have been calling for 2 weeks straight with regards to a debit order query. in this 2 weeks ive been giving wrong information, calls have been dropped. no1 calls back with feedback I have to follow up every time. and worst of all no1 can give me an answer and its been over two weeks and still matter has not been resolved. ?????