Smartpay lease My service was suspended due to improper pin number that is not working with my carrier Internet

I purchase a device online through smartpay lease. When i received the device in the mail. I called the number and provided the pin number it did not work. I had to pay extra double payment to my carrier in order for me to redeemed the service. My service got disconnected and i called smart pay and paid another payment and provided with pin number that is still not working with my carrier to redeemed the service again. I have not had the service for over 2 weeks since i made last payment to smartpay. I moved to different carrier and paid off for device to smart pay. The pin number provided by smart pay never worked. Smart pay still owed me money worth 2 months service plan that i was never having. I will have to request my bank to issue me the refund. It is a nightmare and it is ongoing issue that has not been reserved yet.