Call the assistance team at Zurich (WT Assist). They're available 24 hours a day, 7 days a week:
Phone: +1 877-660-2844 (from anywhere in the world)
Phone: (11) 2526-9312 (from Brazil); or
Whatsapp message: +57 316 851-0533
So that our Emergency Assistance teams can assist you quickly, please be ready with the following:
I was bitten by a tick in Sierra Nevada region on my trip in Colombia, and infected by borrelia. A doctor examined me and I have received treatment for borreliose with antibiotics and probiotics. However, as the brain fog and dizziness persisted even during continuing treatment, the emergency assistance team organised medical repatriation as it is not safe for me to travel with these symptoms.