Use Get Savvi provider or deal with it yourself even in an emergenct

In January we had an emergency and my husband had to be rushed to hospital. I'm now having to sit with an almost R4000 ambulance bill which Get Savvi refuse to pay or even assist with because I didn't use their provider. I used the first provider that arrived at my home. I have decided the time has come to bid them farewell. Never once was I late with payment