Common problem with IX35 - but dealer failed

In Dec 2015 i took my car to them advising them of a problem i have on the vehicle which is still udner warranty. When driving in traffic especially the clutch goes soft and i cannot engage in any gear. I was advised by 1 of their service consultants the vehicle will be booked in and checked. When collecting the vehilce i was told it was covered and authorited however the vehicle can only be booked in for this in Jan 2016 as it will require the gearbox and engine to be removed - takes about 3-4days. I took the vehicle back in Jan 27th 2016 where the vehicle was also booked in for a service. Now mind you i got hourly calls relating to my service and very importantly to the amounts i have to pay. The very same day i was told my Jaco a different service consultant the vehicle is ready for collection, upon enquiring about the clutch problem i was told they bled the clutch and test drove it and no problems. I collected the vehicle 29th Jan 2016 and told the service consultant if there was any further proble