[fake reviews]

#1 fake reviews are not a fact for a growth . There are many more fake reviews .
But  I have seen some new beginners has actual repeat buyers too 

[Fake Buyers]

Yes there any many more in many more ways . i faced lot 

[Gig has no responce. ;-;]

I think best way is contact fiverr CS  , some time suddenly showing all of your impressions and click "0" must be a technical problem . Once As a seller i have faced like this situation . How ever before you reach them make sure gigs are activated.