Peninsula Subaru

I bought a used car and was told that the dealership was required by federal law to keep my and my wife's social security numbers on file due to the amount of the transaction. I confirmed verbally that no credit check would be run. The dealership then ran a hard credit check on myself and my wife two days later against our express instructions. When I called to complain, I was told that they possess a signed credit check approval from each of us despite the fact that neither of us consented to anything of the sort.