After refusal of my administrative review I received this email:
Dear MUHAMMAD,
Regarding Visa Application: --- For: MUHAMMAD
We have made an error concerning your visa.
Please submit your passport to the Visa Application Centre (VAC) where you originally made your visa application in order to receive your vignette with the correct endorsement.
Please take a copy of this email to the VAC when you submit your passport. You do not need to book an appointment to do this.
If the passport is already with the Visa Application Centre, please ignore this email
Apologies for any inconvenience this may have caused you.
Thank you
UK Decision Making Centre