I have to contact the Fisherman Village Guesthouse in Teluk Bahang, Penang.
Unfortunately, I can not find their phone number or email anywhere. Can someone help me?
(I stupidly forgot a bag there)
Their phone is in the Lonely Planet for Malaysia - it's (604) 885-2936. The first three numbers are the country code and the area code for Penang, if you're calling from outside the country. Here's the source. Good luck getting your stuff back!