Uncapped LTE line incorrectly tracking usage

I’ve been tracking my data usage for the past 3 months on my uncapped LTE line, and I’ve noticed that Telkom keeps overstating my data usage. This has resulted in me being dropped down from 10mbs download speed to 2mbs consistently month on month within the first 2 weeks. There seems to be no accountability from them whatsoever and end up blaming their customers, even though there are multiple cases of people reporting this issue.