Irate Customer

I have a debit order on my account it did not deduct so I contacted the call Centre to find out how I can pay, they advised the app, I used the app entered the amount I wanted to pay clicked confirm and nothing happened. I then called the call Centre to Enquiry about banking details only to establish that there was 6 debit orders pending on my account. I have reported that the app is not working the way it should was told it would be reported to IT. Now I am Enquiries two weeks later to establish if my debit order is set up for this month and I have now established that there are still 6 debit orders pending on my account even though they have come back as insufficient funds. I called the call Centre to report it again and I am told there is nothing they can do asked to speak to a manager the girl laughs and then says she will see if one is available I am still on hold???? Terrible service, worst service provider I have ever encountered.