Cell c Missing Airtime

I have been a Cell C customer for over 10 years consecutively but this time around I’m disgusted at their level of service. I purchased R1000 airtime on 10/04/2023 and have been buying daily data and voice bundles until 14/04/2023 was my last daily data bundle and after that about a R700 of my airtime just disappeared. I called customer services and was told a case has been escalated and i will be contacted after 2 working days. No one got back to me and i called the customer service again on 21/04/2023 only to find out that no case has been escalated. The agent then proceeded to escalate the case and i was contacted on 23/04/2023 only to be told that the airtime was used on the internet??? A whole R700 was used on the internet in less than 30 minutes but i had a data bundle as well??? The agent arrogantly refused to give a proper explanation or proof there of and just expects me to take her word that the airtime was used for internet. How is that logically possible??? She then tells me to visit a cell c store? For what i ask her, she then tells me so that i can call her from the store? Why exactly? Then i asked her to get her superior on the line. Her team leader told me they will request a detailed report after I requested proof of their claims. So now i would like to know if they need to request a detailed report, how can they just provide such ridiculous feedback without having the detailed report on hand??? As if i don’t know what and how i used my airtime. I am beyond disgusted at this level of service received and to think i was continuing my completed contracts with them just incase i might want to renew it but now? No thank you, I won’t be dealing with Cell C anymore.