Unlock key remove

I have purchased a pair of Mimosa C5X from Winsta Technologies.
They provided me unlock key with there cloud. Now i want to generate Unlock key with my mimosa cloud. I have contacted with vendor , now they asking to take help from mimosa direct. can u remove mentioned serial number from mimosa cloud after that we will generate unlock key with our mimosa cloud.

Invoice No. Invoice no. INV/20-21/0369
Purchase date 23/10/2020
Serial no. 31-05187423

Please contact Mimosa support directly for this.