Being charged for equipment I have returned

I left VM on 27th November 2023 as was immigrating to Australia. I provided proof of address in Australia, but was still charged over £200. This was eventually returned to my bank in January. I returned VM equipment via their yodel return service. I have now 13/01/2024 received a bill for £40 for equipment that has not been returned! It was returned back in November 2023. I am not even in the UK anymore and calling VM from Australia is less than ideal. Can someone from VM PM me pls so we can resolve this issue as it’s now been over a month since I left the UK.