Follow the steps below:
- Go to your Setting > Payment and purchases
- Click "eWallet"
- Select "Touch 'n Go eWallet", click "Remove"
The payment method will be removed from your Huawei ID.
Below are the articles that may be useful for you :
How do I request a refund for Huawei AppGallery purchases?
How do I make payments using Huawei AppGallery auto debit with Touch 'n Go eWallet?
Are there any additional fees when using Touch 'n Go eWallet for Huawei AppGallery purchases?