Unauthorized debit orders

I have a problem with this company, I took out a loan with them all was good. In December they sent sms that they will run an early debit and I informed them that I will only be paid on the 20th and it's a Sunday, can they please change the debit order to the 22 ND, I phoned more than 3 times and the excuse is they were work g from home therefore the can't get hold of consultant, I sent them email one after the other still nothing was done, we treated like ********* that are running away from paying their debit orders. Debit order went through my bank account and I was charged by my bank for an authorized debit order of R145. Direct axis did not come back to me or change the debit order. This is very ********* to debit my account before my salary date. ***,