In episode #1, Gaitonde is given the Dubai number of Isa by the RAW agent, which is shown as +971 55 2111894. The mobile code is shown 55, which is for the UAE telecom operator Du, which was established in 2006 and where as Gaitonde is in Mombasa in 1994.
In episode 1, it says Guruji died in 2015 at 8:02 and in episode 6 it says it is the year 2016 and shows Guruji.