In this case my competitor is doing it is having a direct effect on my sales.I would not waste my money, Google decides whether to show rich snippets or not, and in most cases now they decide not to. As mentioned above, there are many plugins too which can help you.
Well thats why I am hiring somome else to take care of that because I don't have a clue how to do it.You can also use Structured Data Highlights in Webmaster Tools, it shows you the pieces of code you have to add on your website, and exactly where you have to add it.
I have tried that plugin and it does not function in the way that I need. For example; when someone searches a particular keyword, i need a contact number to show. Can anyone help?Is it a Wordpress site? If yes, Use this: https://wordpress.org/plugins/all-in-one-schemaorg-rich-snippets/