LexMed Debt Management is a ****

I received an email from LexMed with a huge bill saying I owe mweb… meanwhile, mweb stated that their installation is free. I decided not to continue paying the monthly subscription, suddenly I receive emails saying I’m owing mweb because of their equipment and stuff. I didn’t know it was a force to pay monthly, and worse when I stopped paying, the Wi-Fi also stopped working. So what am I actually paying for? I’m receiving calls from a foreigner accent guy saying I should pay all the money immediately otherwise they’ll add interest. Guys I truly feel ****med because initially I paid the processing fee of the Wi-Fi itself for them to come install it at my house. I realized the wifi is just ass and discontinued. Where did I go wrong?