Vodacom zero client service, only empty promises to correct their records

Vodacom does NOT offer client service. I changed my surname, went in person and gave Vodacom Menlyn the required documents. Took out 2 contracts in 2020 without a problem even though Vodacom never corrected my surname. FFW to 23 Aug. 2022: upgrade 1 of the 2 contracts, as 2nd 1 needs a sim swop. Vodacom still has not fixed my surname. 18 calls later, Vodacom gives me call ref. no and e-addres to where I must send my correct-surname ID, proof of (same) address. Since 23 Aug. 2022 NO REPLY, NO FIXING of incorrect surname and their wrong spelling of my address. On 14 Sept. Vodacom sales rep calls for other upgrade. She can see call ref. no., but surname still wrong. Promises to come back to me by end of day. Generates a new call ref.no. Its a week later, NO WORD from Vodacom.