DE LINKING a old cellphone from my profile is impossible.

Its impossible to de-link my old cellphone from my profile. The step by step process does not work. When I call I get tied up into a complicated process that waste my airtime. To try and do it online also does not work. I managed to get my other banks app setup and running within 5 minutes. Even my daughter agrees that FNB is so complicated that its no longer a pleasure to use them. I think its time I close this FNB account that I keep open just as a back up and move it elsewhere.