Renault Vanderbijlpark very ***********

<p>I took in my Renault Clio 2016 model in for a diagnostic (3rd May 2016) as gear 3 and 4 stopped working while I was driving.. The car was booked in for the next day and so I took it to the dealership. Post check up I was told that the gear links were loose and that they tightened them withouty consent since everything was covered by warranty. Today the same thing happened again but this time I was driving on the highway gear 3 and 4 won't work. Now I need to know if this is the manufacturer's fault or did the guys at the dealership not do a thorough job.. Please help </p>