I think I can tell you what's going on. Once you get some pics working and confirm what brand of coilovers you're on we can tell you more.
Basically your front springs are sat on a perch/collar that can be adjusted up and down the shock on a thread. The shock sits within the spring. Hence the name coil over. I'm guessing it'll be wound right down to the bottom. To adjust it you'll need a c-spanner - when you buy a set of coilovers you get one of these in the kit for adjusting the spring perch (and therefore ride height) up and down the threads on the shock body.
The rear is a bit different. The vast majority of rear coilovers for the mk5 aren't strictly speaking coilovers. The spring and damper are separate. To adjust the ride height on the rear there's a cup that sits at one end of the spring. The cup is in two parts. One threaded part stays in place against the car's suspension arm or the locator at the top end. The second part threads onto that part and is where the spring itself sits. Again, you adjust it with the same c-spanner.
A lot of people remove the adjuster in order to gain a further drop in ride height that couldn't be achieved with the adjuster in place. The downside to this is that the rear now essentially becomes a fixed height spring kit with no height adjustment. Then usually the fronts are wound right down to match the rear's new drop.
If you need to you should be able to order a pair of rear adjusters. You'll need to know specifically what coilovers they are.
As for the fronts, there's a fair chance the adjusters might be seized onto the threads. But hopefully you can budge them.
Get hold of a c-spanner and a pair of rear adjusters and it's an easy diy job to raise it up.
ETA: If you can see any branding, part numbers or logos on the shocks, take some photos of those and post them up. You need to identify exactly what you've got fitted. You'll have to jack the car up and take a wheel off. Use axle stands once it's up.
