Extremely poor service from Vodacom

I am extremely angry with Vodacom. Contacting them is a real pain. Their online help topics do not cater for my issue and there is no way to log my issue via their website. My 4G internet via another service provider uses a Vodacom sim card. Their new myvodacom (https://myvodacom.secure.vodacom.co.za/cloud/digital/login) site's login page refuses to accept my password that worked on their old site (https://myvodacom.secure.vodacom.co.za/cloud/auth/login-registration). I phoned their customer care on 14/10/2019 and after a very long wait on hold the lady who assisted me open a support case ref ***. Today they send me a sms advising me they have closed this case. I still have my problem. How can they close a case that they have not resolved? There is also no facility on their site where I can retrieve this ref number to see why and add comments. So at the moment I have no way of seeing how much of my internet cap I have used, and how much I have remaining. This is completely unacceptable. Vodacom at the East Rand Mall and at my office say they cannot help me and that I must speak to Customer Care who were not able to assist me.