LTE ROUTER KEEPS LOSING SIGNAL

Good Day

I would like to address the issue of a LTE router ( NOT A POCKET ROUTER ) I took out on a contract middle of January 2018. Since I had the router it has been giving me non stop problems with connectivity. I live in a area which is covered by LTE on Cell C website. I am trying to use the router but have to reboot it at least 5-10 times a day which is unacceptable and is really starting to annoy me. The first day after taking out the contract, I had to go back to Cell C in tygervally to do a software update on it which was supposed to be done in the store the same day upon purchasing it. I have taken the router in several times and they say its working fine ( getting signal ) I know that its getting signal but it keeps losing signal after a couple of minutes. I have tried setting the router up in multiple locations around my house but it stays the same.

I am fed up of struggling with this router and want a answer as to why this is happening and how is it going to be fixed. At this point I will never recommend anyone to Cell C, neither will I take out another contract though them again.