Unable to Monitor Data Usage Online - Website down

I am a heavy user of Vodacom 3g/4g LTE data and has more than 1 data bundle (different mobile numbers linked to the same account)<br> I have to monitor these daily as I buy additional add-on bundles monthly as to avoid hefty out of bundle rates - up to 20 times my in-bundle rates.<br> I do not understand how a major service provider can de-commission a working production website before they have a new alternative available as I am an IT professional for a major bank myself.