Useless service

March our dept or bounced. Ofcoz we knew and had to sort it out ASAP. On the 25 April I paid the bounced amount knowing on the 31st April they will take the normal dept amount. I sent POP to 2 different emails so they see that they do not have to double dept as I've caught up with the payment. It's the 6 May and they are still trying to dept me! I spoke to a lady today who says because I didn't pay by the 16th April that's why they still trying to take the dept. Even though she can see the 2 payments and that the account has been caught up! You guys has dept me 3 times so far! My account is in a hectic minus because of this! Whose going to pay the unpaid dept orders that my bank charges? Which is 150 per failed dept! Whose going to rectify my account now that it's a minus because of you!!!! I'm extremely upset and irritated!