Horrible Service

So, I have been a very good payer of African Bank loans. This is in fact my second loan. First one was paid in under a year. I have had issues with them that my debit orders are not done on the correct day(they do it a day before pay day whilst I asked them to do it a day after). This adds bank charges to my account. I called them about this a lot of times, they said it was resolved. Last month, the same thing happened. ***???? So, now I paid some lump sum amount into my loan account, requested that my installment be recalculated, they sent an SMS saying the query was resolved. Then I thought, how stupid, they don't even SMS me the new installment amount. I called them to ask that they SMS it to me, lady told me I will get the SMS tomorrow because the department that does it had closed. Obviously I never got the SMS. I phoned 2 days later. They told me yes, the new installment recalculation was done, but we don't know why you didn't get an SMS. on top of that, it can't apply for this month as it was done too late in the month. African Bank, for someone who's been adhering to their payments like me, I think you treat me like a trash can.