Bad service and refusal to honner warranty

HI All I am writing this post and i hope it will not put a bad tast in many off your mouth but i have to name and shame a company: GearBox exchange!!!! I have recently paid them 43 000 to redo my gearbox over from start to finish, after 2000km the torq cobverter failed it took them 3 weeks to fix and was a fight to have it done unfder warranty......at 21 000km main seal came out while i was 4x4 on Coenie Bosman farm and they could not cover it and said it was to do miss use as i got mud on it......they wanted to charge 8000.00 i paid 4000.00 in the end and it still look them 2 weeks to see whats wrong and a further week to fix..... After driving 1000km my bakkie is out again and i am get to know whats wrong with it and they refuse to work on it and say its cause i abuse the Gearbox as there is mud on it...... They will take it to any off there competeters to work on but they are not prepaired to fix it At all.....