Payback the money

Good day MTN, I was contacted by one of your outsourced outbound companies during the month of June 2018. They offered me a P20 Lite + a Huawei ****le for R399.00. I was informed of the pro-rata amount which will be debited extra in the month of July 2018 thereafter I was informed my fixed invoice will be R399.00. July I was debited R593.97 which I’m happy with, to my surprise I was debited R503.50 now in August. I called MTN end of July and the lady I spoke to confirmed that I will be debit R399.00 going forward. Please pull the call recording including the sales call and listen to them. Its hardly 3months and I already regret agreeing to this deal, I need this fixed ASAP or I will be calling your CCM Ronelle or GM Natasha Abed.