All "digital wallets" (including wise, Lazada, etc) are vulnerable to claw-backs, breaches, etc. so advise not to top-up too much.Didn't know a retailer can claw back wallet balance after top-up.
Few weeks ago during the 1-for-1 top up promo, i topped up $20 via the retailer number shared here, and i didn't need to go down Marina Square. The retailer topped up 2 times, and my wallet balance becomes ($20+$20)+($20+$20)=$80.
My wallet balance stayed $80+ for a few weeks, then lasty week, it was reverted to $40. Looks like they knew and told Simba to claw it back.