If the Seller doesn't respond to a considered, low impact effort to resolve a problem, then I wouldn't be worried about them racking up a 'defect'
When the colour you specifically wanted was not included, I'd call that a clear SNAD.
If you don't get a satisfactory response from the Seller, then maybe you need to raise a dispute to get their attention. You are not obliged to proceed through to a claim, as you can close the dispute if you resolve things with the Seller.
However, BE WARNED .... Do NOT close the dispute until you have the right product in your hand - because once you close a dispute, you cannot re-raise it.
If worse comes to worst and you must escalate to a claim (for example, if your dispute time limit is approaching) escalating gives you another 20 days to sort things out.
Then, if time is running out on the claim, I suggest you proceed to the ultimate end of getting your money back.
If the Seller has sent the right stuff which arrives any time after the claim is paid, then you, being an honest person, can always let them know and get them to send you a PayPal invoice, which you can then pay.