Items sent via mailbox are missing/lost

[Scoubaaa]

Hello, I had sent several mails from (rivalgaryy) from the silver server, to my other account (scoubaaa) who was in the gold server at the time I didn't know both accounts had to be in the same server, however whilst on the (scoubaaa) account the mailbox was empty on both servers I had reached out for help about this and was told that I had probably misspelt the recipient and accidentally sent it to (scoubaa) 2' A's this was another account I had and forgotten about it was very new so I had played through the game on that account to beat Erika in order to gain access to the mailbox, And it is also empty on both servers so I am very confused on where my items have gone or if they even still exist

 

Items that I remember sending are:

 

Shiny arcanine mount

shiny gyarados mount

Ghost costume

25-28 rare candies

50 pp ups

Various Tm's

expert belt

diving mask, abseiling rope, pickaxe, hatchet, and other tools

 

Any Assistance would be greatly appreciated thanks you