No airtime loaded on monthly subacription

I did not received my subacription airtime. I check on thr 1ste of month, nothing, again and again. On the 4th I purchase date thinking it will still be loaded. On the 15th my debit order went off. Thought it would then be loaded. Nothing. Bought data again. On 17th I called them. They said my data was up and my airtime was used. This in a day. Cant believe that after I check everyday. I always by data of my airtime on the 1st of each month. I never saw my airtime. Someone is *****ing because its impossible that my airtime disapeared so quick. I dont believe there lies over the phone. The best part is they can send me itemised billing but I will be charges. I said no as this is not fair equity.