unhappy cancellation

I phoned in August to find out when my two daughters Gym Contracts expires. I was told by the lady that my one daughters contract expires in September and the other one in October. I was also told that my daughter that is now 18 has to phone in herself to cancel. She told me to let her cancel in September witch she did. She phoned in and cancelled telephonically but was not provided with a Reference number and we did not receive any information regarding the cancellation. I then phoned in today 3 October to cancel my other daughter's contract (she is under age) that expires this month according to the phone call I had in August. I then enquired about both contracts to make sure they are and will be cancelled only to hear that my eldest daughters contract expired in August and when I phoned in August was not told that. I now have to pay another month gym fees for both my daughters even though it was cancelled in due time. The lady on the phone said that I cannot speak to a supervisor of manager as they are all in meetings and they will not be able to assist me but they will "apparently" look for the old recording and then get back to me. I am not happy that I have to pay another month for both my daughters for a Gym Contract that was cancelled on time.