upset customer

my debet order agreament with them are on the 23 of each month every year in december the send in a transfer for money on the 15 or 18 december that must go to them each year i do phone them but they just take money again the next year as they do see fit. does not matter if the agreement was for the 23 or not. they dont think of there customers credit record they do destroy in the proses. because the dont look out for there customers. if you phone them you must go to the bank get a copy of your statment and then only will the pay you back but your credit is alraedy down the drain because the dont look out for there customers and dont follow there own contract