The following year, he took part in the FIFA U-17 World Championship in Finland: however, shortly before the representative flew back to Sierra Leone, Bantamoi and several other players, including future senior international Medo Kamara, escaped from their accommodation and defected.

Both Bantamoi and Kamara were between the players who successfully applied for political asylum (and, later on, were granted Finnish citizenship), although they had to wait until their 18th birthday to become eligible to play professional football.

In 2009, the Sierra Leonean could add some bits of continental experience to his career when he and Inter Turku were granted access to the second qualification round of the UEFA Champions League, although they were immediately eliminated by Moldovan side Sheriff Tiraspol, following a double 1-0 loss.

In 2014, after two years and a half of inactivity, the Sierra Leonean returned to Finland to sign with FC Espoo, who had recently won promotion to the Kakkonen, third level of the local football system.

His "home team" Espoo eventually relegated, too, so Bantamoi decided to make his third move of 2014, joining Veikkausliiga side RoPs on a free transfer for the rest of the season.

Throughout the years, he supported the poor and the underprivileged kids and adolescents in Sierra Leone by sending essential football equipment (including balls, goalkeeping gloves, jerseys and shoes) to some local academies and centers.