Proof of address

I am tired of going to a capitec branch to open a bank account. LAst week i went to the brackenfell capitec branch and wanted to open for my sister a bank account but i was going to use my proof of address as she stays with me. I produce the proof of address to the consultant by the door and she says the name on the proof is different to my name on my ID because of the initials, the name was my mothers but the address is mine. she told me i have to get consent from my mother and must come back some other time. So yesterday i go to the same capitec with a different POA and consultant tells me the address has a MR infront whereas im a MISS, and i tell her its the consultant of Telkom that wrote it wrongly but the address has my full name and all just that it has a MR infront. Why is it a big deal if its written MR Nasty Coffee but its the same name as my ID name mncm. I just dont have the energy to go back the again, maybe when i have regained the strength again.