Bad customer service

I joined Discovery insure late last year and over the period of 12 months all was well. Now they have increased my monthly premiums without even giving me a notice and i find out on my latest debit order that the changes have taken effect. I did not receive an e-mail, SMS or any other forms of communication letting me know about the changes. I called to log a complaint about this changes and the excessive increase and the person i spoke to said i will get a call same day about my query. And now its four days later and still nothing and true to SA customer service levels i had to call again and i got another story saying someone will call me back. This is exactly the reason why i left my previous insurance and 12 months into our relationship the same thing is happening again. Very very disappointing service from an award winning company