u/Overall-Station-3373

I’m desperately trying to find a legit site that ships to US. Pic for attention

I grafted this variegated loph onto a small trich on 5-6 and the graft seems to have stuck and been somewhat successful, however what started off looking like rust has developed into a large mushy spot on the loph. I dusted it with sulfur as soon as I saw what I believe was rust but to no avail. Is there anything I can do? Can it pull through or is it a goner?