The cost of a full Kwik-Fit service on you vehicle, not an intermediate one, will be around £159-£169 depending on oil type.
Your pads and discs could be deemed to be 'worn' even if there is 50% left on the pads and minimal wear on the discs ! But as the notes were 'advisory' you should be OK for a while. Usually, Kwik-Fit will be more specific and say, ' front pads 75% worn 'etc or ' in need of replacement'.
Tracking ( Wheel alignment) is around £30 at Kwik-Fit, and then there's your suspension bushes ( best to have both sides done together). So add cost of pads, discs to all the above and sub £400 isn't bad.
I have used my local Kwik-Fit for years and never had a complaint. In fact I've spent five hours today watching them work on a variety of vehicles whilst waiting for them to replace coil springs etc on my Mondeo and I admire their professionalism. I am always invited to see any fault before work is done, and the parts used are properly sourced and of very good quality.
They under-quoted the work on my car by about £50 ( quoted for one drop link instead of two fitted) and stood by their quote !
I have two more personal examples of Kwik-Fit service worth mentioning; they passed the Mondeo for MOT but mentioned that one of the number plate bulbs hadn't been working and they had replaced it free of charge rather than fail the vehicle !
My wife's Polo had a broke exhaust support weld on its MOT and they fixed it with an exhaust clamp free of charge again - and passed the MOT.
So, get other like-for-like quotes by all means but I don't think there'll be much in it.
Good luck. Let us know how you get on.