Unfair treatment by my bank

I have been banking with fnb for more than 14 years but since this covid-19 they have new rules that shows they dont care for their clients. I phoned in the beginning of the month to reverse the African bank debit order that I have been reversing for the past 2 years I was told fnb dont reverse debit orders anymore I must apply for cash relieve online to cover for my loss why must I apply for cash relieve if this unauthorised debit order keeps going off my account. Today I woke up to another debit order that went off my pay day is only the 25th how must I cope in this situation a thousand rand gone ... this is totally unacceptable