homemark de***** me and insulted my on the phone call

I have a voucher that I received together with a phone as a package in 2018 June. for a year I have tried to call homemark but they never answer, their number doesn’t work, after trying for 1 year with no success to get hold of them, I finally was transferred to them by Vodacom and I spoke to a guy who insulted me and degraded my status and called me names ,I didn’t believe this was a real call the man added by dropping my call

I since lost the voucher which I never claimed for but I am still paying Vodacom the contract money for my phones. I feel like homemark has de***** me and insulted, this is my second last attempt to fix this issue the next thing I am contacting the Ombudsman for assistance and cancellation of this contract