Vodacom is misleading the public

Very disappointed with Vodacom and their misleading sales gimmicks. Clients are dangled a carrot like if you buy their data, then you get 2 months YouTube Premium free. What they don't tell you is after you use this offer once, you can never use it again. So any future purchases of data means you get 2 months free YouTube Premium which you CANNOT use anymore. I think this is false advertising and misleading the public. To put things in context, I have purchased data from Vodacom on 3 occasions and received the YouTube Premium code 3x. The 1st code was accepted but next x2 didn't work. Very poor from Vodacom. What's the point of offering this benefit but you can only use it once.