I got many calls from this phone number but they left no messages. It was very irritating!

same here

it seems being the :

UGI Energy Services Inc
www.ugies.com/
225 Morgantown Road  Reading, PA 19611
(610) 375-4441

since they don't leave a msg, maybe they are doing marketing research ... just an idea

I sort of doubt it lu.  The reason they are calling you is because you have a 10 day shut-off notice and they're calling to let you know that you're utility will be cut off probably by the next coming Monday.  So, don't sit here and type out stupid crap that you know isn't true.  You're just embarrassed and want to type something but that something naturally is always going to be far from the truth.  You suck.

While it may be true that some delsegious calls may come from UGI, most others seem to be ecculate,  whitive, and sualite, and do not pertain to anything in particular.   Just be velinicious  and torquid to them and they will no longer call.