MTN HR PROCESSES A NIGHTMARE

Good day, I have been an MTN employee between 2013/2014 and I was requested by SARS to obtain my IRP5 for the tax year 2014. I have been trying to call MTN for the past three weeks with no luck what so ever. Every time I call and ask to be transferred to someone who can help, they say that they do not know who can assist as the HR department do not have a direct contact number. MTN is the only company that has nothing in place for an Ex staff member to obtain important docs. Please can someone assist urgently as my tax refund is dependent on my MTN IRP5