Fixxr mobile mechanics

Got my engine overauled with them last year April, got it back after several follow up calls and emails asking for updates, in December I had to call them again cause the vehicle gave issues again and was told it's my timing chain..after the Cr got back in Dec..the engine light was on, I took it back following day and the mechanic said he just needs to clear the fault code, so on my way back home the check engine light came on again. I called immediately and was told that it will go off after some to time. Recently I got stuck with the car not starting and saw that my 3rd and 4 cylinders are pushing up oil. I contacted them as this was something the worked on..was told that I should not have opened .but that a mechanic will be sent to come check...he came, didn't even touch or open the top's cover later that day I received an invoice of R625 for the mechanic to come verify the cause for the problem of which they caused with their poor workmanship. I would not recommend anyone to take their cars here..lucky I recorded my calls. People should know of them.