Actually consumer law overrides anything that is contradicted in TBI's terms and conditions.
"they know, or should have known, they would not be able to supply the products or services within the timeframe indicated or if no timeframe was provided, within a reasonable time"
https://www.accc.gov.au/business/treating-customers-fairly/consumers-rights-obligations
i'll reiterate on mp-43 megatron. it's been 8-9 months after release. That is well beyond reasonable time. If you think this is reasonable then I guess PC had an ok business model.
Mastercard also has a section for goods and services not provided found in this document that helped me win against PC.
https://www.mastercard.us/content/dam/mccom/en-us/documents/rules/chargeback-guide.pdf