i hit that same wall! but mine was too low and now i put them too high and get flashed allot
You need VCDS to adjust the xenon aim which i got very cheaply on ebay.
you put it in learning mode then you use a cross head to adjust the aim on the head light manually, you will see the 2 white screw holes on each headlight when the bonnet it up. Once adjusted, hit save on the vcds and it's done. Resist adjusting manually without VCDS, i tried this and it caused my lights to spasm constantly whilst still being stuck at the floor untill i got it connected up and done properly.
If you are near Southampton/Winchester/Basingstoke happy to help. otherwise there are plenty on here who would prob offer the same, i think some charge a little fee to use theirs.
I used this guide, easy to follow:
https://www.a5oc.com/forums/attachment.php?attachmentid=111657&stc=1&thumb=1&d=1455118430
Some bits you can do to the asthetics in the thread below, might spark some ideas:
https://www.audi-sport.net/xf/threads/mandas-bagged-a4.264197/