MBD harassment with false automatic emails

Constant harassment after making a payment arrangement and sticking to it. Constant emails stating failed promise to pay even though the arranged amount has been paid. I have asked them if they are adding a fee for sending Failed promise to pay emails but no response. Judging by the other reviews on Hello Peter it doesn’t seem that this is a legitimate company. I don’t receive monthly statements so wouldn’t know the charges. Is it worth paying my debt to them? Will my name be cleared when I pay off my debt? There is just zero personalised communication at all.