you can do it urself.
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$ A2 {3 Y! I1 B+ @) U) ztake the brand name of ur lock, go to a locksmith store, you can find the inner parts with keys." H1 z7 w: i. A- S1 N% M( n
change the inner parts, u will be good, it is much cheaper than replace the whole locks." g7 [/ m4 K: h* o
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if it is complicated locks or u have 3-4 locks need to replace, call the locksmith store.$ @& g7 o* |* U& P M
u can find the number in yellow page, choose the one which near you. |