Mtn Router problems

In July 2015 we went to MTN for a new cellphone contract, in that period the employers strike. they could not help me at that moment with a new contract due to the striking issues but Agnes told me that we could upgrade the current old contract we had with them. Since we had 2 contracts with them, my router and the old cellphone contract we went for the deal. Instead they upgraded my router for this new cellphone which i DID NOT agree to now i have lost my router and do not have that internet anymore. I called Agnes and told her about the incident and she said that i can come back in 3 months time and they will migrate my router back to the way it was. So i did go back after 3 months and they told me sorry they can not help me. Currently i receive R 55.00 a month on my router's sim card ( ***) but i can not use the airtime and i still don't have my internet, i had to get a pre- paid sim card and now i have to pay for uncapped every day. It's been a struggle to get them to help me sort this out but they refuse to help me and I am not happy with this situation at all . If I don't get this sorted out i will close all my accounts i have with MTN and go somewhere else.