Offered products that are not covered in our area

We were contacted by Mondo and offered an LTE Wifi contract. We asked them whether there is coverage in our area for this of which they stated that they have checked before phoning and we do have coverage. We decided to take the deal. We received the modem and after about 5 days struggle of being told that it needs to activate or it needs to be Rica'd we contacted Telkom, they advised that there is no coverage in ou area for this product and we should contact Mondo to fetch the device. When we contacted Mondo they wanted to conclude their own investigations first before they fetch the modem and cancel the contract. This is month three now we have had absolutely no response. The modem is not being fetched and the debit order is being deducted for a service that was falsely advertised/offered. We are more than willing to pay for services that are working but we dont benefit from these services at all!!! Mondo states to contact Telkom and Telkom says we should contact Mondo. And everytime you have to start the whole process agaon or you just never get through to someone. Please can Telkom/Mondo come fetch your modem, cancel the contract and refund our money. This is terrible service. You do not care about your clients.