horrible very horrible service by discovery insure

I have been with discovery insure for 3 years and had no problems with them till I called in on the 2nd of Feb 2015 to make amendments to my existing account when I was told that I didn't have any cover, The lady I spoke with was adamant that I didn't have cover so I panicked and got myself immediate cover with another Insurance company for my protection. Since then I cancelled with Discovery, I used to have an access saver account which accumulated about R3k and I was told I can't get the money because I cancelled. Funny that they made a mistake but I'm paying for it...horrible very horrible service by discovery insure