Bad service from mtn

Im working in Saudi Arabia, i have a contract with mtn. I have 2 numbers with mtn, another one is a wifi contract that is finished now and then i chose not to renew it. I called mtn on the 3rd of January to cancel that contract as i even lost the router so its useless for me to continue with it. They said contract was cancelled but when i phone mtn im told is still active not cancelled yet a month later. Secondly i have lost a lot of money calling mtn from Saudi Arabia to try and ask them to activate sms roaming on my number as i need to receive sms as this line is linked to all my accounts. I talk to 5people in one day all of them saying different things. The famous one is there is an order opened on your account it will take 3days. Call after 3days, i call after a week only for some call centre staff to drop the phone on my ears or another will just say she will help me till the line goes dead. Im so frustrated as there is nothing i can do from so far, cant go to head office, cant acess my app as i dont get smses so when i need to enter otp i cant get an sms. I dont know why i have stayed with mtn as a loyal customer for more than 20yrs and i continue receiving bad service after bad service.