Uncapped ADSL and service

My internet was stopped with a message - your uncapped usage is impacting other users, so we are monitoring the usage! (similar words) I am paying for uncapped ADSL - this is the second time they have stopped it- and cannot give me a valid reason why.<br> Went into the Greenstone branch today - they wanted to see a letter of authority as ac in my husbands name. Ive taken many in over the years, and the last ten years have not had to provide anything -should have been logged in their system. They then tell me that I need to give them 30 days notice to cancel the ADSl as a service provider - I Dont have a contract anymore-the last contract I signed for 24 months (when they did not need a letter from me then???) was in 2010 -- and the uncapped was handled telephonically if I recall - again without authorising letter! So as the contract was for 24 mnths and they are not giving me the service - why do I now need to provide 30 days notice?<br> The chap in the Greenstone branch was deliberately obtuse -I explained I'd not needed to provide a letter for over ten years - Ive purchased ADSL,changed contracts in that time and was not requested to provide. Telkom to resolve - service nonexistent