TMobile shows my hotspot usage is 14x what I have actually used

I am previously a Sprint customer that was transferred over to TMobile last year. Since then I have had multiple issues with my hotspot usage being inaccurate. My plan just renewed itself on the 19th and according to Tmobile I have already used over 300GB. I checked my phone and computer, together I have used just a bit over 22GB. I keep trying to explain this to the customer service chat, but they made me feel like if I went over my limit. I have a 120GB plan at 5G, there is no way I hit 300 in 8 days. I use my hotspot for work and streaming. I haven't even used my hotspot everyday.I couldn't send the rep any pictures as the app crashed when I tried. 

When I check any type of usage on the app it is extremely off. Right now itnhas my current usage (mobile data) at 800GB...when I tap it and it takes me to another page it says 21GB. That is a huge difference.

When this happened to me in July, a rep was very helpful. She had me turn off/on my hotspot while she looked at it on her end. She did some kind of reset and everything went back to working fine. I kept trying to tell the reps this is what they did so they could take a look at it again, but they just wanted me to take a technical call. 

Why can't the reps just have me do the same thing and reset so I can use my hotspot. It sucks to pay so much and I can't even use it properly. 

Why haven't they fixed this issue, it seems mutiple people have had it for over a year now. 

Is there a better way to have my hotspot reset so I can use it? 

Will tmobile ever fix the overview on the app so it reflects what I actually use?