Yep, most companies have those small outlets in every corner. And you can easily find as well as those independent retailer places that sell all companies, honor all contracts, have most models at great prices... and can't take us foreigners -most of them.
OTOH, Chunghwa made a massive marketing effort recently and opened a myriad of mini offices staffed by less than 10 people, which then placed all over the city - I guess competition was getting intense. In the past, I had to take time off or go on Saturday mornings to the only office in Xindian. Lo and behold, now we have one a couple of blocks away, opened while I didn't notice, so small. There is the medium sized one in Gongguan, and a lot of smaller Chunghwa outlets along the way. Easy to get your stuff done, and they can serve foreign customers.
OTOH, the Xinyi branch -main one- is as helpful as always. Who was the one who said it seems as if an atoga had deflowered the bosses daughter, for they treat you there with the most suspiciousness?