The 1st 7e I went, the staff straight away rejected my request. I don't wan argue and just left.

2nd 2nd 7e, the staff replied "not sure" and even ask other staff. I just mentioned my friend successful paid. Then the staff try with doubt. In the end, it's success.

Managed to pay TnB bill RM20 on 30 & 31 Dec to enjoy RM4 CB for 2 days.

That was the 7e promo with TnG, no more

I think you can explained the steps below to 7-11 staff on how to pay bills using touch n go ewallet.
Steps:
1. Tell the staff you want pay TnB bills using TnG eWallet.
2. The staff will then select bill payment->TnB at their counter (They can select various bills like Unifi, Air Selangor, Astro, etc)
3. Show your bill barcode (softcopy or hardcopy) and let the staff scan, in this case I just show my barcode in smartphone.
4. Tell the staff the amount you want to pay.
5. The staff will then manually key in the amount.
6. The staff will scan your TNG eWallet.
7. Receipt will be printed out.
8. Keep the receipt for reference just in case any issue occur.
Refer to post 3911