Argos to honour orders they take money for

You guys sound hilariously over-entitled. An automated system took your money, it was not a deliberate coup by Argos just a mistake pricing an item up and there is certainly no legal basis on which you can demand these goods at this price (if you think there is maybe spend 10 minutes looking into Argos' own T's and C's). If you make a mistake purchasing an item (e.g. by accidentally paying £10 too much) you certainly wouldn't take any nonsense from Argos that you were happy to pay that price and therefore have no right to get your money back.

Aside from anything else you are essentially highlighting yourselves as lacking a basic level of common sense since anyone who had this would know there was a strong chance this would happen and know it was a punt at best to even try buying this. Trust me Argos will not care even if all 135 of you never shop there again in fact based on the ridiculous sense of entitlement I'm sure there's many staff who will be relieved to never have to encounter you again.