In a Facebook post at 4.30pm, Octopus apologized for the suspension and said the service resumed.

Customers who failed to top up their cards online after paying by credit cards will get a refund automatically.

Money transferred from FPS for top-up will be stored in the Octopus wallet.

Octopus users report problems with the top-up system on Tuesday morning, saying they failed to top up their cards but still saw money deducted from their credit card accounts.