Poor service!!!!!!

I have had the worst experience with Mtn and they clearly don’t give a rats ass about they client. I changed banks and wanted to update my details so they can debit but to my surprise you can’t do so instead I was told to pay in store or before my debit date or they will debit from my Absa’s closed account. Right, is there any logic to the above no manual capture or an overriding the system to assist me! It’s all good though I just want a settlement amount which I requested last month till today nothing!! To top it off they suspend and block our phones when they want.