What does "recourse" mean here?

Goodday, I was looking through terms and conditions document and there was a sentence I don't understand very clearly:

"In case Purchaser's claim against Seller is a matter of recourse following a successful action against Purchaser under the statutory provisions of the sale of consumer goods, claims of recourse based on the statutory provisions concerning the sale of consumer goods shall remain unaffected. "

Firstly, I don't know the best way to interpret these phrases: "matter of recourse" and "claims of recourse" (which are used in the same meaning I suppose).

Another thing that is a bit confusing is this part: "following a successful action against"; I assume the action goes first and then the claim (if I am not mistaken, vice versa case requires following by an action); also, "action" here means some sort of measure or decision made agains Purchaser's claim (?).

And the last one is "shall remain uneffected". Uneffected by what? Every time I read it I become more bewildered than before.

Would appreciate any help, thank you.