Very bad customer service

I had an upgrade on the 8th January 2019 at Vodashop Randburg Square. The upgrade was supposed to come with 10GB once off and R500 voucher off Samsung Galaxy S9+ original covers. I didn't get any of those. Instead they gave me a R10 000 Top Dog voucher without consulting with me and when I asked why they told me that they don't have original Samsung covers because it's too expensive for their target market. And as for the 10GB I had to lay a complaint first to get it. So now when the lady from admin called, she told me that my contract doesn't exist and that I have my phone for free and she asked me to take it back. So today I went to Vodashop Randburg Square and they tell me another story. They say whoever's called me wants to commit ***** on my contract. Like I'm sick and tired of this. I don't even want this contract anymore coz these consultants seems *********** and they don't know their job. I have been with vodacom for a long time and I've never experienced such bad service and consultants that don't inform/educate customers about their offers. I'm so ****ed right now. Such poor service.