cSpaceDiva
From the post it wasn't clear to me if you had provided the reason you didn't want to read for them anymore, or if you just said you weren't able to. It also sounds like you left the door open for future readings by saying you were "not sure" if you would do them anymore. Myself, I would give a straightforward, truthful explanation, something like, "I don't feel this was a fair exchange. I believe I put in more time and effort than you did. Overall, it was an unpleasant experience and I don't wish to repeat it. Please do not contact me for readings again."
If you have already done that, then I would simply cut off contact as has been suggested here. Do not respond to the person at all, and put on a block or ignore list if possible.
If you have already done that, then I would simply cut off contact as has been suggested here. Do not respond to the person at all, and put on a block or ignore list if possible.