Charged for cancelled LTE

We tried LTE but were not happy so returned it within 14 days no questions asked. The form was signed for it to be cancelled at Menlyn shopping centre branch as well as all sim cards and modems being returned. <br> <br> No one I chatted to online can explain why we are still getting charged for LTE. I have deducted the 2 LTE amounts from this account and paid for our landline services only. Could someone please assist with why we are getting charged if the LTE was returned.<br> <br> I would also like to query why we are getting charged extra for a jack as Telkom only installed one and thought it is part of line rental.<br> <br> Looking forward to your assistance with the above.