Zomato — don't refund my money. harassing a lot

Address:

700049

I order food from zomato.My order no is [protected]. I paid money online from paytm. After placing order a zomato valet said me to give him extra money for deliver my food. I have evidience. His call was recorded. After few moments my order is rejected by them and they give me a panalty charge. Although I dont do anything. I mail them many times but they dont do anything. Plz sir help me.