Presure....next time i don't want help friend anymore

My friend keeping ask me to help him to change the watch battery more than 2 weeks....then today he push his watch to me ask me to help him he said change at Malaysia is cheaper....Then just now i go to Giant...sun bian to change...it cost rm25..i was wandering in the past the expensive i have pay b4 only rm13.....then that shop saler after had changed then pass to me....he keeping said take carefully.....i think why ?I think only rm100 +++is not the big deal....Then i check wedsite just now ,just found it cost 2k ++++....pressure i scare how to bring it back to SG to him....cilaka never told so expensive...haiz Kena scoulded by my mom and father...If it lost how??? cham Longines http://www.orolus.com/cgi-bin/ShoppingCart.cgi?action=ShowPic&search_for=L4.720.4.11.6&search_brn=LONGINES&search_sty=&lowest_price=0&highest_price=99999&ori_action=Go&detail_category=.&detail_sizes=.&detail_keyword=L4.720.4&search_logo=