Tesco Clubcard reward - corrupted QR code on email

At the end of May I cashed out all my remaining clubcard vouchers for Prezzo vouchers, in 5 different batches. I've got 5 emails with the rewards, but on 2 of the emails the QR codes aren't showing. There's a tiny image in the box where the code should be. There's also a code next to each square, a jumble of random letters, does this represent the same thing? Do I need to contact Tesco or will the restaurant accept these letters as being valid?
Make £2025 in 2025
Prolific £229.82, Octopoints £4.27, Topcashback £290.85, Tesco Clubcard challenges £60, Misc Sales £321, Airtime £10.
Total £915.94/£2025 45.2%

Make £2024 in 2024
Prolific £907.37, Chase Intt £59.97, Chase roundup int £3.55, Chase CB £122.88, Roadkill £1.30, Octopus referral reward £50, Octopoints £70.46, Topcashback £112.03, Shopmium referral £3, Iceland bonus £4, Ipsos survey £20, Misc Sales £55.44
Total £1410/£2024  70%

Make £2023 in 2023  Total: £2606.33/£2023  128.8%



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