Plugin Author not responding

I purchased the Go Pricing plugin. I installed the plugin and I’m having an issue " deprecated function get_magic_quotes_gpc go_pricing " attached to the plugin code. I’m looking for a fix.

I went to Granth Support submitted a ticket 2 days ago and as of now, I have no reply.
For some reason, they do not want or are unable to respond.

The problem displays on my web page.

And suggestions for a fix would be helpful. Thanks in advance.

Please give them time to reply your support request. Also you can post a comment in the plugin comments page and let them know your concern. Thanks