HANDED OVER although i have proof account is paid

in early 2014 we cancelled our contract due to the financial difficulties . After explaining and showing the proof to the admin lady at virgin she phoned head office and spoke to a lady that gave her a settlement amount. We settled it there and then as mine was just over the 800 mark and my husbands was 900 some odd -and could not get a printed invoice as the power was off. But knowing her well, we assumed everything was 100%. Never heard from Virgin active again until i joined up in feb/mmarch this year 2015. When i joined i was told there was an outst amount of 900 someodd on my account, i explained but offcourse they are not interrested, so I was told to pay 50% and the other 50% will be written off seeing that i am joining again. In the meantime, i asked the lady to check my husbands ID to see if his was in the clear because by now I truly lost all trust, He's came up 100% clean. 4 days AFTER i joined and once again settled my balance we received a lawyers letter stating my husband owes 1222.00 . Today 09/07/2015 I got a sms stating I have been handed over ON THE 4TH july for not paying my fees of 365.00 for July. On the morning 4th of July i paid the 365.00 at the reception