Worst service ever. Loyal customer for 11 years.

My bank is still not getting back to me about the error they made on there system for my debit orders for a personal loan with fnb. My debit order for the loan is the 28th of each month. The bank thought it would be wise to do the changes without my consent and they changed the date on there side from August to the 25th. And the proof is that for the month of June and July the debit order came off the 28th and they did not fall on holidays so there couldn't be a reason for the debit order not go through on that authorized date of the 28th. Because I knew my bank was useless I made the arrangements to pay the loan of in three different installment. Which the first is the original debit order amount of 1292. The other amounts are 250 and 400 respectively just to honor the account and keep my credit rating good. I'm so unhappy about this as till this day my bank have not given me any positive feedback except for lying to me. Request call recordings and see how no one make senses when speaking to me. Last month they did something silly again. Where I had to do a eft payment for the loan and the following day I was debited for the same amount. Then it shows on my banking app that I missed the payment yet both payments went through and I was put in the negative. I do understand that everything takes a process but this is ridiculous from thus reputable organization. I can't wait to get done with them as I will look for other bank elsewhere.