Prime contractor has withheld payment to sub contractor since close of project in June of 2020. Primes contract with city expired in July and needs to be reinstated. Prime contractor failed continuously to submit invoices to city in timely manner, which always delayed progress payments for quantities to us as sub contractor. Prime contractor refuses to do the work to reinstate the contract in order for his business to be paid do that he can pay us as sub(pay when paid contract). What legal remedies do I have