2007 Toyota Camry XLE (3.5 liter, V6 ) automatic 6spd transmission

I have had this car for almost a year now. I was told the
radiator had a crack in it. That was replaced, also
transmission fluid mixing in with the antifreeze reservoir
tank. I had a used transmission put in. I've also notice the
thermostat gasket was leaking so that was replaced with
the thermostat. After all of this, I've noticed my antifreeze
has been getting low fairly quicker then normal . Found a
leak by the lower clamp, replaced the hoses and the clamp.
That was about 2 months ago. Now I'm seeing bigger
puddles of antifreeze right by the lower clamp. I can tell it's
coming from the clamp by taking my index finger and
rubbing across where the clamp is. I don't know what else
can cause this issue. The car is not overheating, so can
anyone give me tips on what I should do next