Bad service

I walked into Vodacom Waterfall Mall, Rustenburg to port my MTN number and get a contract. Consultant mentioned an old router number on my profile & offered to upgrade, I refuse, I don't need upgrade with more data, I am retired. He did upgrade paperwork for my ported number (that's what I thought) and I signed. Next day I received Invoice - Upgrade on router & higher premium. I phoned consultant and asked him why he upgraded something I clearly refused, his reply "well, you signed for it". Customers, please don't just trust the consultants, check everything. After contacting Shop manager/owner, he apologized for consultant and said "at least you have 10 G now. I am still speechless, luckily soon my other contracts will come to an end at Vodacom!