I've received this email THREE times from UKVI. Twice was addressed to the wrong person. I'm assuming escalating means they are doing more nothing. 20 Business days from today is nearing the full 12 weeks of waiting for a decision.
"Thank you for the information you have provided.
We escalated your case to the relevant department. You should be contacted regarding your case within 20 working days from the date of escalation.
Please allow the 20 working days to pass before contacting UK Visas & Immigration International Contact Centre again should you not receive any further correspondence.
Regards,
Harish
UK Visas and Immigration"