Congratulations for persevering.
I've tried them 2 or 3 times and always give up.
which sites? if you've managed a few referrals on a few sites i would recomend
www.exceem.co.uk thats how i got quiet a few referrals by trading with other people completing offers for them with one in return.
plus i have won over £100 on those offers mainly football betting ones.
good luck, i gave up around 3 times taking months breaks in between got 6 referrals out of 12 within a few weeks but convinmcing friends and family took a while. it was well worth it in the end. i might be trying a different site soon.