Poor Customer Service

I have been with Supersonic for 3 years and the only real issue was the download speed which I was told downloaded between 10 - 20 bps. I was lucky to reach 5. On the 30th July I waited up until midnight to download on my my Nightime data. I was still awake at 2am when I received an sms to say I had reach 70% of my Anytime data. Another sms at 5am to say I had reached 80% of my Anytime data even though downloading was after midnight. After a month of querying, I was told the sms were sent out late and I was using Anytime data ?All I requested was that the 10GB be deducted from the Nighttime data and reallocated back correctly to Anytime data. There was no 10GB usage on my Nighttime data on that date and time.. On the 31st Aug 22 I was told as I did not have any proof of time of download and therefore Supersonic were not prepared to assist. I will be cancelling my contract and based on the reviews is going to be another huge issue