I had a new one piece tub/shower and faucet /shower installed. The spout does not fit tightly and can be moved up and down as though the hole where the pipe comes through is too large. It does not leak. It is a Pfister pasadena screw on type spout. What can I do to correct this problem?

It is a Pfister pasadena screw on type spout.
Does then pipe coming oiut of the wall have threads on the end? Back to you. Tom