Hi all, apologies if this isn't the right sub forum.

I'll try to keep this brief but I could do with some advice after purchasing a used car.

Bought the car just under 2 weeks ago (Suzuki Swift 07 plate 98k millage, diesel). Put the deposit down and the dealer put it through an MOT.
Dangerous defects - Brake pads less than 1.5mm, Handbrake eff' less than 50%
Major Defects - Both front suspension arm pins/bushes worn, parking break inoperative on nearside and offside rear.

Work was done by the garage who MOT'd initially and then passed it once to the standard.

I'm a new driver, first car so my experience is limited but it seemed to drive just fine. Handbrake was a little high for my liking but it'd just been worked on so I wasn't going to question the work of a qualified mechanic.

I took it to our family mechanic who services all our family cars for a service a few days later. He wasn't able to change the oil because the cap was screwed on so tight getting it to loosen may damage the plastic housing. He also asked if he could have it back in a weeks time after his holiday because he wasn't sure the handbrake was actually safe and the suspension felt 'off'. He also remarked it looked like it may have been in an accident at some point (I checked the plate nothing reported to insurance companies but...).

I park up a few days later, apply the handbrake so I can reach something out the passenger footwell. Take my foot off the break and the car rolls into a parked van (I've spoken with the driver we're square and have exchanged details, I think he took sympathy on me, as there was no damage we agreed no harm no fowl).

I contacted the dealer to explain the handbrake wasn't holding correctly and he gave me the usual, it's just been adjusted, some sit higher than others millarky. I got him to agree to take the car back (after mentioning I was advised to get a refund) and have it checked again by the garage. I was meant to take the car there today but hadn't heard from him so contacted him to be told he had an appointment with his son at the hospital and could we do it tomorrow instead. I agreed.

I went to collect my friend this evening and stalled on a hill (whoops! haha). Foot brake went on, handbrake went up so I could do a hill start. Expect the handbrake isn't holding the car at all. I pulled the handbrake as high as I could and it rolled regardless (friend took a video out of disbelief).

After this, I have absolutely no faith in the dealer or the garage he will no doubt be using again and I want to reject the car.

Is this is sufficient enough a reason? I'm sure this fits under not fit for purpose or as described?

What do you all think, appreciate your help in the matter.

Thanks,

Tidus