Still BS.
"Brick and mortar" stores might have their own policies but usually it is 28 days as long as the product is in "resealable condition".
Below, just as an examole T&Cs from GAME:
When does the GAME returns policy apply In-store? We offer a 28-day right to an exchange (subject to availability) or credit note on our products (excluding gift vouchers/gift cards*) purchased in-store and returned in-store, provided that:
- The product is returned within 28 days of purchase;
- You have a valid proof of purchase which can include any of the following documents (except where you are returning an Xbox Console or Controller which requires a receipt as proof of purchase):
- Receipt.
- Reward card record.
- Bank statement or credit card statement.
- The product is returned in its original condition (unopened and unused).
- If you are returning an Xbox Console or Controller the serial number must match the one on your receipt;
- The product and/or digital content has not become mixed inseparably with other items after their purchase;
- The product is complete and contains all component parts as purchased. Items purchased as part of a combined product (for example a combined hardware and games product) can only be returned if all items in the combined product are returned together;
- The product is re-sellable;
helps.game.co.uk