Bad service from Adcorp Blu

My name is Jillian Jansen I've been working for Blu for about 6 years. My contract ended last year September 2022. I cannot submit my tax returns, due to an error on my IRP5 certificate which needs to be amended via Adcorp Blu. I have been struggling for about a month now, whatsup messages and emails. Nothing have been fix, ive been send back and forth. Blu even requested a letter from sars, which they know sars do not issue letters. I cannot amend it myself on efiling, which I was informed at sars. This is really bad service, Adcorp Blu will be the reason I cannot submit my tax returns due to their incompetence. I was in contact with Berenice, Nadeem, Merilynne Paris and Dennis, still nothing has been done. I've send proof from sars to show them the error, still they cannot amend it and refuse to contact sars to confirm all this.