Sorry folks I know it's been asked before but still a bit confused about service of my wife Mini.

Will be 2 years old in December 2019 and has slightly more than 11k on the clock and was bought in April this year. After calling Douglas Park in Hamilton and Harry Fairbairn in Glasgow both said that it would be an oil change and microfilter change and wanted to charge £500+ and £200+ respectively. This seems excessive to me as Douglas Park also wanted to change the brake fluid
Obviously don't mind paying for work to be carried out but this seems to be robbery. Is there a problem going to an independent garage who are capable of carrying out the service using authorised parts and can they reset the service light and record the service data.
Again sorry to repeat the request for info.