Responding without reading the entire thread.

D/s & BDSM is reliant on good communication, so in a situation like this I would prefer that the Domme say something like:

"Thanks for reaching out again and I am glad to know you had a good experience when we played before, but I just felt that our chemistry was bad. Although I am a professional, I do this because I love it & that wasn't the experience I had in our session so I feel it is better if you find someone more suitable to your needs."

Then, when I inevitably try to respond saying give me another chance I would understand the block & ghost response. If you don't respond at all, I generally assume technology problems & will try multiple avenues to contact while also having an incredible amount of stress until I realize that you are literally ghostung me (it is also less likely that I will have a poor opinion of the Domme). I also, think ghosting is just weak & I wrongly expect that Dommes should be stronger than that.