******* change of address on my billing

I would like to understand who authorised vodacom to change my address that is reflected on my invoice and statement from my FICA'd home address, to my work address. This was not authorised by me, is not FICA. And was not requested. Furthermore how much sense is it to change to my work address from my home address in a pandemic when i am and have been working from home in the last year. I would like this rectified and returned to the original reflection which is my HOME address