Cellphone number porting ***** and Vodacom's inability to do anything about it

I just want to comment on how absurdly *********** your number porting solution is. I have had two ********** attempts to port my number to MTN over the last 12 hours and even though I have rejected both attempts I was informed by your own number porting desk that the only way I could permanently stop this from happening was to have my number flagged, however this is not possible due to the fact my number was once a contract number that has since been converted to prepaid and your systems do not allow for it. Due to the fact this is my sole mobile number and linked to my banking the only recommendation that Vodacom can give me is to change my number, a number that I’ve had for over 10 years and all personal and professional contacts have. Will Vodacom pay to have my business cards reprinted due to the fact my number has to change plus any other costs incurred as a result of this? I can’t believe there is not a way to simply flag this number to reject all porting attempts against it