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What specifically does your Aliexpress order say with regard to the specifications of the scope you ordered?
If it says 80mm f6 Triplet & you were sent an 80mm f7 doublet then I would raise a dispute via Aliexpress. Unfortunately, you will need to have evidence to back up your claim that you ordered the 80mm triplet in order to pursue the dispute.
If you have the specfics on your order or, perhaps a screenshot of the advertisement when you ordered i would lodge a dispute and at least see where that goes.
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