Seeking compensation from a firm due to breaching the contract

I have a contract with an interior design firm. They estimated the decor work and furniture delivery will take 3-4 months in the contract.

The furniture arrived in 6 months; some parts are damaged/not like the original agreed on designs and the decor work is yet to be finished which is a full year and a half after the contract was signed.

Since it was not done on time, I had to book other venues to hold some private ceremonies which I would have done in my home and they were told about that from the beginning when the deadline was established.

What are my legal options?