Vodamail falling apart

Since last year I have had endless problems with my email address. First Vodacom had the right to decide which emails I can receive and what emails they will just delete. No problem receiving spam but important business emails just never come through. Then Vodacom proceeded to delete my ENTIRE email inbox. Then I started to have the problem where my emails only come through to me anything up to 2days after they where sent to me. BUT YET SPAM COMES THROUGH ALMOST INSTANTLY. I also have the problem since last month where I cannot send emails from my PC using my Fibre line. I now have to connect my Phone to my PC to be able to send. This has become impossible for me to proceed with business as very often I get emailed OTP's and when I finally get them it is to late. This week I missed a payment that had to be made to SARS by 20:00 on the 7th and the email I needed that was sent to me at 9:27 the morning to make the payment was only received 20:10 that night which was past the deadline. This resulted in me having to pay a penalty or R6599 the next morning. I constantly call the call center then have to explain the whole story from the beginning, They then open a escalation and a few days later I eventually get a call promising the word but end up with no joy. Who is Vodacom to decide what emails I may get, When may I get them and not allow me to send my emails using any other service provider other that Vodacom. I have been with Vodacom since April 1994 and this is the type of service I receive. I do think it is time I start looking at a new service provider. I now just received a email while typing this review 04/13 22:30 that was sent to me from one of my biggest client on 04/11 09:08 for an urgent collection which has now resulted in me loosing even more business. I AM NEEDING EXTREMELY URGENT ACTION TAKEN OR I WILL BE GOING PUBLIC WITH THIS AS THIS IS COMPLETELY UNACCEPTABLE.