TymeBank's Very Poor Customer Service

I made the mistake of transferring money into my wife's TymeBank account, with the intention of putting the money into a fixed deposit with TymeBank, at a really good rate of 11%. But we are currently in the UK, so there is no way for my wife to access her account: she no longer has the South African cell number, so the OTP doesn't reach her. Three phone calls, and three or four emails later, there is no progress in resolving the problem. TymeBank is not even acknowledging my emails. We have asked that the funds be transferred to my wife's Nedbank account, and sent proof of the account - but TymeBank appears to be doing nothing, and the funds are languishing in the TymeBank account, earning no interest and, seemingly, completely inaccessible.