IRP5 incorrect

I am an ex employee who is trying to get my IRP5 for 2018 from Capitec for the last two days. Their response is they are short staffed and have payslip requests that they need to deal with. How is this my problem? When they should have given me my IRP5 then? Why do they now act like they are doing me a favour. Especially since SARS has picked up an error on this IRP5...makes me wonder what is really going on here.