An American boxer has been living in Japan for 3 years. He lives in the Kansai area, so he speaks Kansai dialect. He complains that after 3 years in Japan he still hasn't fought against a really strong opponent, then he says this sentence:
ちゃんと強いヒトホンマ相手頼んますわ〰 ほな前座はこれにて――― 閉店ガラガラガラ――
Here you can see the whole page. What is the meaning of the second part of the sentence, in particular 閉店ガラガラガラ? Is that Kansai-ben too? Thank you for your help!