Pregnancy of 18 weeks. Uterus must ha!

I m 18 weeks pregnant. I want to abort this as I am unmarried and didn't know I am pregnant. I tested earlier in June but it was negative then. I had missed my periods in past so I thought there are some hormonal changes and therefore it is not coming. But when I missed more periods, I went to gynecologist and found that I am pregnant. I came to Delhi and checked for options. But the doctor i went to, denied saying termination of more than 3 months  pregnancy is illegal. I went to few more gynecologist but no one gave any good answer. I came back to the first one I met and requested her. She said she will do it and asked me for big amount of money. she then gave me few pills. 2 pills to take same evening and 2 pills to take 2 hours prior coming to hospital. I did so. I came hospital and was admitted. They are giving me Syntocinon but my Uterus isn't opening. She isn't increasing the dose either. I don't think they have given me Syntocinon, they are just lying. Otherwise Uterus must ha