Less than a month, and issues already

So I am currently with Supersonic for a FLTE sim and router ,for less than a month, and I have already encountered issues . I have downloaded the huawei smart home app as suggested expecting things to be simpler. I have received 2 texts on the app saying that my lte sim has subscriptions. It is not possible to even try to have a subscription as the sim cannot be used in a cellphone. The system has now stopped my internet usage. Claiming that I may have account issues when I haven’t had my first debit even. This is ridiculous that this is happening. The WhatsApp contact that you are supposed to text with queries takes ages to reply . I hope this is the last time I’m having a problem with them