If a Thompson & Morgan coupon code isn't working, consider the following steps:
- Check the expiry date of the coupon code.
- Ensure the minimum spend requirement is met.
- Enter the code correctly, including any upper and lower case letters.
- Verify if the code includes both letters and numbers.
- Remove any other promotional codes as only one can be used per order.
- Contact customer care if the issue persists.
For more details, visit their website.