SIM SWAP unable to resolve for 25 year old number

Cell phone ****** , same phone number for the last 25 years !! can’t have a activated a sim swap as the number is inactive and deactivated and contract department blames pre paid blames post paid blames who ever else to within MTN South Africa “”resolve”” 7 x days so far . cell phone number was used 4 hours before PHONE ****** *********** to say the least !! Reference number SMC *** MTN call centre is absolutely ***********