Peugeot 208 Drop link

[Buzz2016]

Hello,

I need some advice before I go in and see my "mechanic" on saturday

Basically a very long story cut short, a lot of work apparently needed doing on my 2012 208
Alternator
Air con compressor
Wishbone
Drop link
Rear brake pads
Front tyres


I took it in and had all the work except the drop link done, instead this was first diagnosed as being the wishbone.

My car since around Jan has been making an awful creaking/squeaking when going over bumps or large pot holes.
The "mechanic" "checked" my car and said it was the drivers side wishbone, this was replaced in July and still my car is making the noise, I have taken it back and they have said that it never made that noise when they were working on it, it is a recent thing and now the drivers side drop link needs replacing.

Firstly, would the wishbone cause my suspension to creak and squeak?
Secondly, if it had been checked properly would they have picked up on the drop link needing replacing
Thirdly, how long normally would it take for the drop link to start making the noise? would it be immediate or would it work up to the insane squeaking over a speed bump?

Honestly, my car knowledge isn't that great. The mechanic has already screwed me over with my alternator and air compressor which has cost me close to £1000
I have had another £400 worth of work done before having the drop link repaired.

Help, please!