Unauthorised debit orders

I have 4 unauthorised debit orders on my account 1. RNM Holdings R95, 2. Dazobase R97, 3. East Coast R169.95 and 4. Goodcon R98 to a total amount of R459.95. I have tried to to stop and reverse them but they did not stop to take my money. The consultant in my branch told me the only way to stop them is i have to search for those places and request them to stop deducting money from my account. My problem now is that this has affected my credit scoring because some were returned or unpaid because there was no money in my account and others took the money that was meant for my important debit orders. To my suprise Absa was the first bank to decline my home loan because of unpaid debit orders and so did all the other banks. I am very dissapointed with absa's service because i had never incurred such challenges when i was banking with std bank. now is seems like moving to absa was the biggest mistake of my life. It really pains me how much i tried to increase my credit score but only to be *****ed by my trusted bank. Now please advise me where to go from here with my home loan being declined and how do i get rid if these unauthorised debit orders besides getting a new account number because I am trying to get a hime loan.