MTN Ebilling Site Not Working

I have been trying to retrieve my invoices, statement and itemized billing for March 2020 and April 2020 but the https://ebilling.mtn.co.za can’t be reached as ebilling.mtn.co.za took too long to respond. I have also phoned 808 and 135 without any success.

I can't submit a claim to my employer without these documents. Please MTN kindly assist.