The GC is not paying us - we are a second tier sub - and we have bad material from our supplier that is no longer on the job. The supplier filed a notice on 7/25 which we did not receive a copy of. The GC is now asking for releases which we cannot provide because we have not been paid and we had to pull all the bad product (their product is not on site anymore because it all failed). We filed our notice upon contract execution and they filed their notice 7/25. We had used them on the job in June, April, and prior to july. Now that there is none of their product onsite due to failed material, and our GC isn't paying us because we cannot provide lien releases from the supplier (we haven't paid because we are owed a credit from the supplier for bad material, and we haven't been paid by the GC). How should we proceed? Does the supplier have lien rights?