I'm not sure what you mean by "which MSC provides maximum phone calls mystery shops". I assume you mean an MSC that offers a lot of phone call shops. So the ones I know that have some are Intelli-shop, Ath-Power, See-Level, Best Mark. Of those I think Intelli-Shop offers the most. I'm sure there are others but those are the ones I know.
What's done is done. An egg cracked cannot be cured.
There are 3 kinds of lies. Lies, Damn lies, and statistics.