Automatic account change without notification

I have been a loyal customer of FNB since I was 10 years old. I had been using a Nexty account until recently. I recently turned 25 at the end of March of this year and only recently realised that my account was changed to an Aspire account. I am still very much a student and this was surprising to me because I can not afford the bank charges and the additional functionalities that come with this account.

My main concern is that in some brochures the age is 18-25 and some it is 18-24 when I was researching about this. Additionally, the change without notifying me is concerning. If the cut off age is 24, there is nothing I can do about it and I can accept that. But if there is going to be a change to my account that affects the fees I pay for the account, I should at least be notified about the change or the upcoming change so I can review my options and go in to a branch to choose a suitable account for me should I not be happy with what the automatic change is.