Samsung Galaxy S6 Edge Plus stuck on Reboot Mode

Got an upgrade to a Samsung Galaxy S6 Edge Plus early November after 23 days of using the device it ran an update then got stuck on the re-boot mode before I even paid the first installment of the contract took it back to MTN cresta on Saturday the 28th of November, were they said it was going to be taken in for assessment by a technician with the promise that Iu would get Feedback by Wednesday, by Wednesday no one called me so I called them and was told there was no feedback till I went there this past Saturday the 5th of December only to be told that the device had a software failure and would be fixed and this would take 2 weeks!!!!! 2 weeks to fix software honestly starting from today that means all throughout Xmas I will not have a mobile device. If I cant get a better service from MTN would rather cancel that contract all together am not happy with your service at all.