Once again just like normal internet is or off or running at 0.01Mb

Once again you took my money but you don't provide service internet is so bad that not even WhatsApp works please can you explain as to why it is that if i miss a payment by 1day you cuty service but if you decide not to provide service or internet access its fine? A person needs to pay a monthly subscription and a additional 900 in phone calls to you as you don't phone back please advise what a person should do to get what I'm paying for