Unacceptable Service

In 2012 my dad took his motorcycle to Auto Motorcycle PE, the engine seized.After spending R22 000 to repair the engine, the bike started giving more and more problems.The bike went back and forth,problem not being fixed.Nov 2014 I lodged a formal complaint at the JHB branch because I found it totally unacceptable to be without a bike for almost 3 years and the PE branch always have excuses.My dad got his bike Dec 2014, side covers missing.The covers arrived after 4 months, incomplete and incorrect.Now he must wait again for the correct parts.The JHB branch was very helpful but why should they sort out the problem when the problem is the PE branch.But the PE branch delivers such bad service, always full of excuses and stories, and you have to follow up constantly, they don't phone you. 3 years to get your bike fixed and then they deliver it incomplete, and when they send the parts, they don't send everything, and the part they do send, is incorrect!How long is my dad going to wait now?And will the parts be complete and correct when they do deliver?