
Sergey Makhyanov
The app doesn't have an option for the picker to "remove an item from the order if it's unavailable." So, they call me when I can't speak, and they don't pick my order because there are no instructions. There's no support chat in the app. Often, many items are unavailable, and I haven't received a refund for the difference for three weeks.
Big C Supercenter
January 19, 2026
Thank you for the detailed feedback—it’s very helpful. We’ll use it to improve picker instructions, in‑app support, stock accuracy, and refund speed. For help, contact 1756 or LINE: Big C TH.

Б Н
Please could you make it more user friendly 🙏 I always face a log out problem. The app doesn't keep you session for long, authentication token TTL is too short. I have to log in every time when I open my app. I come to the Big C shop, open my app to show my loyalty program bar code and I can't show it because the app kick me out. And I have to show my phone number or log in again in the app. It takes time and I get the side-eye from the people in the queue.
Big C Supercenter
February 9, 2026
We’re really sorry for the inconvenience. Our team has already improved session stability in the latest version of the app. Please update to the newest version for a smoother login experience and longer session duration.
If the issue continues after updating, feel free to contact us anytime.

Matthew McDonnell
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The delivery service is completely unreliable. Example: 1. Placed order at 9:45am for delivery 2-3pm the same day. 2. At 4:15pm, delivery is >1hr late w/ no update or option to cancel 3. I call customer service and they refuse to cancel my late order 4. Store calls me and says they will cancel my order 5. At 17:00 the driver calls me and says he is on the way. The store never cancelled my order, as claimed. Overall terrible experience that completely undermined the purpose of the app.
Big C Supercenter
January 5, 2026
We sincerely apologize for the delay and inconsistent updates regarding your order. We will urgently review the coordination between store, driver, and customer service to prevent this from happening again. For further assistance, please contact 1756 or LINE: Big C TH.