Thank you all for the replies. I appreciate it.
I actually got kind of mad and bent the spring too much to the point it was useless. Yeah I take my frustrations on things. But anyway, I never liked how the right rear brake (caliper) worked, me being a perfectionist and all... The good news is that I went to a local shop and they had the whole assembly (calipers, noodle, boot and even the pads included) all for $15 (CaD). WTH ! I paid $12 for just the front pads last week (at a different shop). My rear pads were shot and needed to be replaced. So, for 3 more dollars I got the whole thing. I even got 4 reflectors (2 wheel ones and 2 for the handle bar and seat for free), which I needed since I had none on the bike. A pretty easy choice and a very good deal. The other shop wanted $40 for the brakes !
Oh and they're Tektro and I already installed them but couldn't go for a ride because it was almost dark by the time I was done but they seem to work -from looking at them when I pull the brake lever- better than the Promax and even the spring mechanism seem to be better on the tektros.

Thanks again for the help.