Done paying for nothing

Where do I start...received a call from them advertising LTE Router not checking if it is compatible with my area... I cancelled my previous provider thinking it was a great deal. Well only to have problems from the word GO! WHEN phoning them to tell them there is no connection im being told the towers must be off.

Only to find out from an Mtn store its not compatible to my area.

This was carrying on for months.

When you phone they say they will look into it. Its almost a year now. The device was collected and now im still paying for something I dont use. Mtn told me they will log a complain against Mondo but anyway... They quick to sell something but not quick to fix their mistakes.