AN INCREASE OF ALMOST R3000

I received an sms for the price increase for my medical aid, which i am on keycare plus, my contribution is R2414 for my brother & i(he is not working), i contacted discovery to find out what documents they required & i emailed then the relevant documents & they send me an sms stating that i will be paying over R5000 which is way over my monthly salary, I have been trying to contact discovery but received no joy. If soemone from discovery does not contact me, i will be looking into moving to another service provider who does not rob people!!!!