Fishless cycling using Dr Tim's One & Only live bacterial product

No need to add more bacteria. You are already seeing nitrate, which is in the final phase of your fishless cycling.

There is no such thing as "instant". Bacteria don't just magically eat up all the ammonia you toss into your fish tank "instantly". They convert it over time of many hours. The rep you talked about sound like he/she knows little about fishless cycling and was poorly trained.

You do not need to do partial water changes to lower nitrite. The nitrite is needed for the bacteria to multiply.

I am unfamiliar with zeolite, but from past experience my activated carbon pad in my canister filter didn't affect the ammonia readings during fishless cycling. If it can absorb all ammonia, then there is no need for fishless cycling at all. Isn't that right?

Seachem Prime can temporarily turn the toxic ammonia into relatively harmless ammonium, but isn't Dr. Tim's product is ammonium to begin with? So it doesn't really matter here.

What you need to do is to keep dosing ammonia/ammonium every day while keep eyes on the readings. Make sure you add more ammonia than you have used. No need to do partial water change until the PH start to crash. The fishless cycling should be completed pretty soon since you have already had nitrate.

When I used Tetra SafeStart, basically the rebranded product of Dr. Tim's, the fishless cycling was done a lot quicker.