Telkom failed to rectify its error and reissue correct invoice

I signed a contract with Telkom towards the end of June 2021. Now they've sent me an invoice and the title that I'm addressed with shows Mr instead of Mrs. I couldn't update this on their app oand the self-service website. I called them this morning to rectify this and because the error was on their side when they captured, I asked for a new invoice that reflects my corrwct title. They said it will only show on my next invoice. Now I am stuck with an invoice that presents me as a man and I need to submit this same invoice to my company for data claims. Now it will seem as if I'm using some man's invoice to claim for data.

In this day and age, Telkom fails to correct customer's details, on which the mistake was theirs, and reissue a correct invoice. This is very concerning and disappointing.