Substitute a part of string (ignoring special characters)

Suppose that I have a list of strings, and I want to substitute different parts of it by re.sub. My problem is that sometimes this substitution contains special characters inside so this function can’t properly match the structure. One example:

import re

txt = 'May enbd company Ltd (Pty) Ltd, formerly known as apple shop Ltd., is a full service firm which is engaged in the sale and servicing of motor vehicles.'

re.sub('May enbd company Ltd (Pty) Ltd', 'PC (Pty) Ltd', txt)

Here the issue is coming from ( and ), but the other forms may happen that I’m not aware of it now. So I want to totally ignore these special characters inside and replace them with my preferred strings. In this case, it means:

 'PC (Pty) Ltd, formerly known as apple shop Ltd., is a full-service firm which is engaged in the sale and servicing of motor vehicles.'