Poor communication and customer service

I have been with the for four years now, using Mymo account for few time the bank consultants would call me to upgrade to a better account and I would dismiss them on the call until I got curious about this better account, told me the benefits of achieve account i also upgraded without realizing that my info is changing as well. They have been sending emails on my other account this month i decided to open that email as I need some banking info, to my surprise my Ucount account is closed due to non payment and I wasn't aware email them to understand spoke to an agent named Dominic who told me it was my fault for not calling them and inform them as they're different entities. How will I know their structure. I opted for standard bank after I was let down by capitec bank in my time of need I'll not stay with the bank that does not value my hard earned money.