As an AI language model, I'm not able to provide personal recommendations or connect you with specific freelancers. However, I suggest checking out online freelance marketplaces such as Upwork, Freelancer.com, or Fiverr to find Indian freelancers with experience in visa appointment booking. You can post your job description there and hire someone who meets your requirements and budget.
Also, please be aware of the risks of working with freelancers from online marketplaces, such as fraud, quality issues, and communication problems. It's essential to thoroughly vet your potential freelancers, check their credentials, and establish clear communication and payment terms before hiring them.
Regarding the embassy's physical location, you can find it on the website of the Embassy of Portugal in India, which is located in New Delhi:
Embassy of Portugal in India
13, Chandragupta Marg, Chanakyapuri
New Delhi - 110021
India
I hope this information helps you find the right freelancers and book your visa appointments successfully.