Company is totally damaged

I took out a contract around 2008, everything was fine during the sale process then my vehicle was broken into and stole my belongs which includes the devices I got from Nashua. This is when the company made my life a living hell so I called to block my account details which was not done the person that stole from me ran the bill up after my call to nashua mobile! I then called to call centre on numerous occasion they did not want to hear my side because no records could be found!!!! after ramming my name through the mud i eventually just paid the bill which was not a few hundreds but thousands and which i did not use! I just wanted them off my case because i was in the process of purchasing my property now 2016 a outsourced company states that nashua wants the money that I've already paid which i did not use after so many years! I just want to be left alone i don't want the money I just want to never hear from nasuha mobile ever again I'm so glad that this company has gone to the ground where they belong!!!!!! who ever took over their account I'm sorry but will not deal with anyone associated which nashua mobile due to their mistake which is life threatening.