Deplorable service

I relocated and changed my cell phone number. I was advised by Nedbank to contact *** who would update my contact details to ensure I continue to receive either an 'Approve it' message or OTP, in order to perform transactions. I made contact for the first time on 6 March 2022, I have followed up with six further emails including one to the 'Client complaint helpline'. As of today 15 March 2022 my details have not been updated and I cannot transact with my bank account. This is a ********** experience and the lack of communication and assistance from Nedbank is disgusting. Notwithstanding that I am in another country and unable meet my financial obligations owing to a lack of interest on Nedbanks side. How many more emails must I send and how many more departments must I contact in order to simply get my contact details updated.