Mobile broadband internet not working properly

I live in a rural area so you were not able to give me DSL or fiber internet. I had to settle with a mobile LTE internet. The internet connection is always unstable, the ping is always really high and it constantly spikes, the speed is never as promised (50 down , 20 up ) in reality its always ( 15 down , 20 up ). The router comes with a website for managing your internet (o2.spot). It  is one of the worst websites I have ever had to use. The internet randomly turns off every couple of hours which makes me have to go on the website and manually turn it back on, BUT I can't even reach the website because of a glitch that states: “Only one user can manage the web management UI at a time"Even though I am the only person who ever uses it. So then I have to go to my router, turn it off and on, run to my phone and hope that I can turn the internet back on before the glitch happens again just so I can run into another problem. I have to cl ick " connect " about 10 times before the internet turns back on ...  So after all of did my only option is to contact Either you Which I 'm  doing now or get a new ISP. But that 's up to you ...