The TransferWise Acceptable Use Policy dated 24 July 2019 doesn’t allow VOIP business to use TW. The blog post from SimWood is from 19th March 2020.

I’ll leave it to TW to explain when they changed their AUP, how come SimWood s was able to use them later, and also for SimWood to explain how come they didn’t track the AUP changes at TW, and instead felt the account closure to be sudden.