Refused to pay after being double charged for ****py advice

Went to a few other lawyers (after realising I'm just wasting my money, the advice I was given was not sufficient or barely minimum), they charged half what I already paid (including represention). The amount they charged me (without even representing me). When they came with email for more payment, I wrote a lengthy letter they won't get another cent out of me, stated why. Today I've found out they reported me to TPN for the R 2300 they wanted from me. I would gladly have paid if they didn't double charge me and gave me better assistance (by that I mean not try and see how much they can milk me).