My inventory was erased on SV

First of all I’m not completely sure if this is a bug so I’m very sorry if this isn’t the correct place for this thread.

Yesterday I changed my name from eourhcsrg8w34rgn to Christofqrt(I think it’s obvious WHY I changed it). But, when I logged back onto sv my inventory and ender chest were both erased. I really want to get my stuff back, can I please get help from an Admin?