garnishment of wages

I'm really in a mess. I don't know if this is the appropriate place for this or not, but if anybody has had their wages garnished, please give me any input you may have. I lived in a townhouse where the landlord was a real "slum lord." It was in a nice neighborhood, and the outside of it looked great. The inside wasn't too bad, but I lived there for seven years, and he did as little as possible to it. I drew the line at toilet water running into stuff that I was cooking on the stove. That's just to let you know how bad it was. The first year I lived there, it didn't need any repairs, and I paid the rent like clockwork every month. Then when he started getting lax about making repairs, I started getting lax about paying the rent. I paid it, but it was late. I figured if he didn't hold up his end, why should I? I know that was the wrong attitude to have and I should have put it in escrow long before, but I thought if it ever went to court, the court would side with me due to the way he handled any repairs it needed. Anyway, I told the office the day before I moved that I was moving out. (I've never done this before. I've always been on time with my rent and never had problems with getting repairs done). I contacted a lawyer who told me I would probably have to pay since I didn't put it in escrow. I called the owner (who happens to be a lawyer) to discuss payment arrangements. He agreed to $100 every payday, if it was done electronically, which I agreed to. The amount was more than I thought I owed, plus he tacked on court costs and interest). Anyway, he was taking it out when he felt like it (sometimes the day of my payday, sometimes not until right before the next pay day). Anyway, things went fine until I had problems with my payday loans, in which case one of the landlord's transactions bounced. I contacted him immediately by phone and left a message to call me so that I could get the money to him another way. I never heard anything. But the next pay day, the $100 came out and continued that way until I received this notice of garnishment. There was a card you could mail in to dispute it. I mailed it in, and this is where I have a question. If I missed that one payment, but he continued to take payments out after that, would I have a leg to stand on against the garnishment that the court has already ordered? Any insight would be a tremendous help.