'Sold' unworkable solution then totally ignored !!

A representative of Mondo 'sold' me a solution on Friday the 10th of December. What she didn't tell me was that the solution was incompatible with my router, therefore the solution would not work. I contacted Mondo on Monday the 13th and was informed that my system would be returned to it's previous WORKING state. It is now Saturday the 18th and I still don't have a working system. Mondo seem to be totally ignoring my requests for assistance.