How to deal with bad service from Verizon Customer Services?

I called Customer Service this morning to ask about the billing question and it turned out to be the most outrageous conversation. I always think Verizon strive the best to assisted customer in any way they can, but not this careless, ruthless and ignorance customer representative. Most business tries to make their customer happy with their product, but the assistance I got from Verizon this morning is a headache. By the way, I terminated my service by any cost to not ever have to deal with this careless, ruthless and ignorance customer representative.