Getbucks dishes out bad service

I have been a loyal Getbucks customer for years but lately i dont understand the pathetic service being dished out . I was suspended from the system because of their faulty somehow someone decided to change my debit order date without informing me. My debit order has been the 22nd for the last 3 years same as my salary date but someone just out of the blue decided to change it to the 26th without my knowledge obviously all my debit orders are done on the 22nd and to avoid ************ ********** out there i asked my bank to reject debits outside the 22nd i set with my creditors . I now see i am suspended on their system i have been a loyal customer but this is just not acceptable. I am 57years old with high blood pressure and dont need this stress. I have a credit of over R3300 on my account because of extra payments i usually make to finish paying my accounts early ,can you please deduct the R600 i owe and put the difference on my wallet please.