PEP Store Cellphone deal Lies

I just bought my mom a Stylo phone from PEP Store in Randridge mall. I was informed that once we buy airtime for it we will get double the airtime. Instead we only got R22 worth airtime after recharging instore. We enquired from the lady who was assisting us and she tried to call MTN customer service and then she said she doesn't know why our airtime got depleted as soon as we recharged and the promised double airtime was nowhere to be found when checking balance. The lady ended up sending us to the MTN Store whereas we bought the phone that comes with the sim card fro PEP Store!! This was a very bad experience and poor customer service. Do not sell products that you have no clue of and cannot help when there's issues. Deal with your issues instead of passing the buck. Worst Experience!!