Rmcs airtime subscription

In 2015 around October,I decided to close my account with legit due to personal reasons.they told me that I cannot close until my airtime contract is cancelled....So they called Rmcs for me I was told my airtime subscription contract has been terminated hence my Legit account was closed..The problem now is I still receive the airtime since then and I do not know who is supposed to pay for it....I want my number to go back to prepaid again.... My cellphone number I ********** 836 I need you help Sincerely yours Mangoma P Z