Trending @Accenture; Need Help HR not responding

Need help

So I got an offer letter for chennai location level 10. I asked for gurugram. Hr said that gurugram is not available but we can shift it to Hyderabad and there was increase in .5 lakh in package. So she said that accept the already sent offer letter and she will also send the updated one. I accepted the offer in which chennai was mentioned. But now she is not picking up my call or anything its been 10 days included weekend. What should i do as I have accepted the offer letter and haven't resigned from current org. What should i do L10 angular offer 3.5 years experienced.

I have mailed her again and again three follow -up then sent escalation level 1 on Friday today have done follow -up no results. Any inputs guys?