Broken product myself

At 2:10 on Friday the 3rd of November I bought a beer at pick n pay liquor at the Glen shopping center on arriving home I opened the beer to see a big chip in the top of the bottle. After taking a sip I noticed there is no gas in the beer and it was completely flat. I phoned the store manager and he told me to come in to the store to lodge a complaint. Now I must waste my money and petrol driving back to the shop so that they could "maybe" give me another beer. It's going to cost me more in petrol than the actual thing is worth. And he wouldn't be able to tell me how long it would take for them to lodge a complaint with the supplier either, so I could potentially wait there for 30 min?