Charged for data that is not being loaded I have proof of this

I started using homecloud last year March then I left the country till September this was before data was carried over so I could not pay for the WiFi since I wasn't around. Then I came back I paid up my account by the way I'm on classic 20 so they gave me a new sim. On the 15th of march this year around 7pm it was active I only use WhatsApp for this. I leave for work at 6am when I got back the following day at 7pm 20g had been depleted according to them. I queried and supposedly they added more data for me which didn't last a week either. I decided to remove the sim on the 1st of May I found out that they had loaded 5g I called them they supposedly created a ticket no reference number too. I was calling them the whole of May. I stopped payment when they didn't fix this because if they can't sort my problem out are they going to fix my money problem if I pay. Today again they loaded 5g but the bill I got says I got 20g last month and this month I'm getting 20g so last month I didn't pay and this month I have stopped the payment again so I pay 400r a month they say I owe 800r since its 2months. I was happy for a few months was wondering why people were complaining now it hit home I understand. Till they sort me out I will not pay