Firstly, it takes less than 2 minutes to reply to a client telling them that you are extremely busy with other work. He doesn't even attempt to do that. This is bad business practice right from the get go.
Secondly it doesn't take months to integrate a WHMCS or Hostbill theme or even days for that matter, it can be done in a matter of a few hours sometimes even quicker for simpler integrations. I'm not assuming this, I know this, I have integrated themes before. The reason I haven't done on these two occasions is purely a time constraint thing. I didn't have the time to do this as I'm dedicated to other projects at the moment, now it would be quicker for me to curt my loss and do this one myself, but why Should you when you have paid someone to do something for you.
I know Payton agreed with me about my first bad experience with him as he was nice enough to offer me a partial refund, which I declined as he did get the job done eventually. He did however give me a free integration credit for later use, however this does seem a bit of a loss now as I can't seem to get it done anyway.
Not at all, if you don't know what your talking about then don't bother to comment on this issue.