There are literally dozens of videos available for customer service training. Most can be previewed online - for free - so you simply choose the title that best meets your needs. Please note most videos also include leader's materials - either in electronic or printed format - so be sure to at least get an outline of those materials too.
For British accents, the best source is www.videoarts.com
Otherwise, one of the newest general releases is from www.EngagingTraining.com
Finally, there are roughly a couple dozen distributors of training videos, who offer roughly the same product line, always at the same price. A couple recommended distributors are www.trainingabc.com, www.business-marketing.com,
Since the prices are the same, distributors are best chosen on the basis of product knowledge, service, and selection.