carisma gdi 1.8 125ps transmission problem

Fagrzeug: carisma 1.8 gdi 125ps Bj 98 manual gearbox Moin moin. With the carisma of my father-in-law, the return cycle no longer goes in. I looked at the thing today and found that if you press the lever on the gearbox by hand and hold it tight It goes somewhat. Unfortunately, I found nothing where you could do something, my also the ball head has some game. Can you adjust something and there are replacement sockets for the string on the gearbox? Everything looks good, vehicle has only 45000tk on it. I read that it is a Renault gearbox to the not gdi and that the jacks are often there, but to the gdi I did not find anything.