Beware 30 days is not 30 days to Virgin Mobile

Cannot believe Virgin Mobile SA. Have been a customer since 2008, contract has been renewed and offering changed over the years as their offers required changes. The original package was a free sms contract taken out for my deaf mother in law. They stopped this offer a few years back and on renewal we had to change, which was I guess OK.....The real problem comes in now when I give then 30 days notice as stipulated to move to prepaid......guess what No No No....notice given on 5 Nov, service will terminate 5 Dec but will continue to be billed via debit order on 1 Jan AND 1 Feb........someone at Virgin Mobile cannot count what 30days notice means......effectively service will stop in 30days but I will be billed 90days.......amount is insignificant, but a clear example of not doing what they say or advertise, beware in using Virgin Mobile. Would give the call centrer lady 5 stars she was really great in dealing with an irate longstanding customer.