Telkom cancelled my contract without explaining

i`m very upset i called telkom to confirm if my contract is cancelled.the person who assisted me said i should send him the cancellation form i send before. i send him the form. he asked me if i want to change the contract to pre-paid or cancel completely i said cancel. not understanding. when he came back on the call i asked him what does he mean when he said change to pre-paid or cancel completely he said i was supposed to ask. i said no he was supposed to explain. i asked him how can i log a complain he said he will change the account to prepaid. not explaining that my account will be closed and all the data about will fall away. I`m so upset cause now My phone is no longer in service and i just bought 3gb of data. how can telkom just cancel my contract without explaining how the process works. i have never received such bad service from telkom and I`m with them for over 3 years now. i want my phone back on today!