Keep in mind that this may not work, and in most cases, companies do not have a way to route calls back to specific calls centers or specific countries.
Many companies operate with a virtualized call center environment -- with call center agents in multiple states and countries (some working in call centers, others working from home). These companies use a phone switch and VOIP to route calls to the next available agent, and while the agent may be able to transfer you back into the call qeueue, there is no way to route your call to a specific site (unless the company has set up a way to do this).
It has been my experience (having worked in call center operations -- in luding monitoring calls from customers who had complained about the phone reps) as well as being on the customer end of the line, tht many people complaining about the accents are those who refuse to calm down and listen to what the agent is saying.