Is National Customer Service Center (800) 375-5283 phone useful and safe

zandrewv

Registered Users (C)
Is it safe to call National Customer Service Center (800) 375-5283?
How often may somebody use it without chance to affect the process of his/her case?
Does somebody know the "terrible" stories related to that phone?
 
I called many times and did not see any negative impact so far. I may not get much meaningful answer any way. At one time I was not happy with the answer of no answer. I insisted to talk to the supervisor and it was OK too.
 
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