cindi Teardrop

I have an avatar (Ammaci) and I wanted pretty feet and hands so I purchased a package that was a slink product. (Never used slink before) Went to a sandbox to wear them and was told I couldnt apply mesh products there and they must be rezzed inworld. I don't know how to do this! Can anybody help me!

My avatar is in a cloud and can't rez. What do I do?