WORST Service ever!

I have a service plan with MFC. I booked a service on last Monday for last Saturday, I gave all my service plan details and asked for a Major service (75 000km). Brent called and told me that I have to pay for the service (after the service was completed) since they no longer accept MFC clients because MFC does not pay them.<br> Obviously I was furious and adamant that I will not pay so he asked someone in the background how much it costs and then told me to not worry it's fine I can collect the car. When my husband got there he asked them to show him what they did and they told him they did a major service. He asked should he sign anything and they said no. When he got home I checked my service book and found that it was not stamped thus I have no proof that the service was done. This made me even more furious. I sent an email explaining everything and asking for answers and most of it was ignored by Brent who rep****. It then came out that they did a minor service and not a major service. This was my last covered service with my MFC service plan.<br> I want answers and solutions.