False advertising and misleading customers

I have contacted vodacom on numerous occasions requesting the voucher they advertised with the upgrade to the Note 20. The customer team first said they are having a problem with the voucher and it will be sorted. Now I am told everyone got their vouchers and I didn't qualify. Though the morning when the applications opened I received a confirmation of my order and that I have qualified for the voucher. I still have this proof. Though Vodacom seems to be unable to keep up with their advertising.