Audi A5 steering problem please help!!

[Jalden94]

Hello, I own a 2011 Audi A5 1.8 tfsi. It’s hard to explain what the feeling is I feel but I will try my best to describe it. THe steering feels like it goes light when u put your foot down and becomes harder to controlI. If I was to go round a corner and give it a bit of gas the steering goes really light and almost feels like the steering wheel moves freely untill it catches grip agian. It almost feels like it doesn’t grip as better and wheelspins easier.(this isn’t me driving like a complete !Removed! it does all this when going slower but is defiantly a lot worse with a bit gas). Anyways I put the car in with a garage he looked over it and said he couldn’t see anything mechanically wrong with the car. So then I took it to Audi and got them to diagnose it. And they said it could be the steering rack.but the words where “could be” “might be” “if not further investigation needed” and took a video with them shaking something underneath the car the didn’t appear to move to me and the slapped me with a quote for £1600. Obviously I was sceptical and wasn’t willing to go out on a limb and pay the money, so I took it to a 3rd garage (Audi specialist) to get a 3rd oppionion, once agian they said that the steering rack looked fine and in there opionion didn’t need changing. However they noticed my left ball joint needed changing. So I got the work done drove it and it did feel a lot better, but defiantly not how it should. Drove the car for another 500miles and it was back to square one. Put it in the garage agian, they then said I needed my lower suspension arms on both sides done but only charged me for one balljoint as they done the other one before hand. Got the car back and once agian felt better, but not how it should be and now she’s slowing getting back to square one agian. This has all cost me well over a grand and I’m honestly sick of it witch is a shame because the car is a beaut. Any help of suggestions will be very much appreciated, meny thanks josh