none of the mobile phone banking facilities functi

I changed numbers recently and have been trying for over a week now to download cellphone banking. everything after entering details a message comes up saying that routine maintenance is taking place and to try later. On the banking app, no digits can be entered from my android phone. Fnb mobi encounters an error and refers me to the. Co.za site, where once again one can enter all digits, except for an OTP, which accepts no digits. Same on the RMB site. Only way to do banking is to log on to a pc, which is impractical as I don't have access to one while on maternity leave.I have reported this and was told it's the software on the phone, which makes no sense, as it was working perfectly fine for many many months on all platforms.