Airtel — Booster pack for U.S, CANADA

Address:

Chennai, Tamil Nadu

Sir, my mobile number-[protected], I purchased a booster pack for U.S , Canada ,rupees 31/ validity 1 month on12th august, 3.37p.m the I.D number is[protected] , this is activated by 7 p.m . I made a call to Costa-Rica ,which is in central America ,the mobile[protected] , call duration is 1.58 seconds , they have deducted rupees 30 in my account. where as the charges the u.s countries is 1.50 rupees per minutes only. kindly reimburse the excess amount .
my mobile - [protected] .
Costa- RICA , mobile number[protected] . called[protected], by 7.30 p.m.