Poor customer service

Last month i send my gear level in for a recon by this company,It costed me R5100 to fix with new cables,My bakkie was by the mechanic and auto electrition for some repairs,I eventually got my bakkie back and been driving if for 2 weeks,Last week wednesday i drove and i did not have gears on my bakkie the lever is very loose,Went back to the mechanic and he look and found the same problem occured again,i contacted the company to informed them about what has happend,Jackie told me shewill get back to me redarding the matter,she then whatsapp me telling me i abused the lever thats y it broke,i mean really plastic that hard,and now all off a sudden their is no gurantee on recon parts,but invoice does not indicate anything about,i called in and spoke to a guy by the name of steven or steve in which he tol me i must speak to their manager,i must call the next day to speak to her,I must call them no concern to take my details and call me,its a week later nobody calls or any communication from them.Now i had make plan to get it fixed so that i can sell my bakkie,but how do i sell it like that, This company does not care about customers only their money,DON"T DO BUSINESS WITH THEM AT ALL.