MTN customer dissatisfaction

I would rate MTN service as a big zero as I am absolutely dissapointed with the service of MTN as my boyfriend has taken a contract over phone with empowered outsource solution , when he received his laptop it was the incorrect laptop as he was promised a i5 laptop and received an i3 laptop as well as the incorrect contract as promised, he asked for a 24 month contract and received a 36 month contract, with this dissatisfaction he called the call center to rectify this but was either disconnected or put on hold for hours, he tried for days, eventually he took his laptop after 5 days and went to pavilion MTN to cancel the contract or rectify the situation by asking for the correct product and contract. The consultant at MTN took the laptop and told him to call the call center they cannot assist him at the store but took the laptop. He called the call center and canceled the contract they told him it is canceled... Up until today he is still getting charged for this bill.. He went again to mtn on a weekend to sort this out and they say they cannot assist him as the call center isn't opened on a weekend, he was unable to go on a weekday as he works and does not have leave available... When he was given off at work due to the festive season he went to mtn in pavilion at his own cost every time only to find out the pavilion mtn store is closed... This is absolutely unacceptable as how can mtn not assist you at the store yet they can bill us.