Bad Internet

It's been a month since I got my router and sim card. My device worked for a few hours one Saturday about 3 weeks ago. Since then I have been trying to sort it out with the company. I have taken out the an extra package from them for technical support from a company called M&Y Mobile. I have been in contact with them. I received one call from them last week, on which we changed APN settings. This still did not work I have informed them the very next day to only get a response yesterday via email to ask me to change the APN again, on which I responded that I have done it last week already but I will check again. Tomorrow is the 1st and they will take payment again for no service and I will still have no service. They are definitely not Best Internet more like worst internet.