You will have to wait for the 30 days to pass to receive the code, as per the T&C's
Buy a Samsung Galaxy S23 Ultra 512GB or Samsung Galaxy S23 256GB ("Qualifying Purchase") direct from O2 between 8 June 2023 until 5 July 2023 and claim one pair of Galaxy Buds2 Pro Graphite for £1 (other colour variants excluded). Galaxy Buds2 Pro Graphite value worth £219. Galaxy Buds2 Pro Graphite value based on price of Galaxy Buds2 Pro Graphite on the Samsung.com/UK website and correct as of 8 June 2023. Customers who purchase the Samsung Galaxy S23 Ultra 512GB or Samsung Galaxy S23 256GB will receive an SMS containing a unique voucher code of that value of £218 after 30 days of purchase date. After voucher code received, add the Galaxy Buds2 Pro Graphite to your basket by selecting pay in full option. Within the basket paste your unique voucher code into the ‘Got a promo code?’ section for discount to be applied. Discount can only be applied to the cost of the Galaxy Buds2 Pro Graphite. Voucher code expires on 5 September 2023. Voucher code can only be used once, in a single transaction. One voucher code per transaction. One claim per customer. To qualify for the Offer, you must not change your device within the first 14 days. Subject to availability, while stocks last. No cash or alternatives. Offer may be withdrawn or amended at any time. Change of mind policy applies to Qualifying Purchase and Galaxy Buds2 Pro Graphite as a bundle. If you return the Qualifying Purchase without the Galaxy Buds2 Pro Graphite, you will be charged the standard retail price for the Galaxy Buds2 Pro Graphite. Terms apply, see o2.co.uk/terms.
This is not O2 and we are all customers here similar to yourself and cannot answer account type queries.
