I can't no more

I'm so tired to struggle all the time with my internet. I ordered a lte home router then once I received it they said that I can't use lte. Then the product was faulty and had to send it back. Yesterday I received the new one and once again it's not working. This is theft as one is paying for the service but u don't get none at all. I pay almost 3000 a month and still it does not matter. I'm really over all this **** now