Sorry, you have read wrong. Plaza Turisol is basically an office complex for the tourist companies & excursion companies!!
You probably mean the Plaza Comercial in Playa Dorada. This has most things but they are mostly tourist orientated & are consequently well over town prices. Negotiate on everything you find interesting, then move on to the next shop (same stuff different lable!!) & re-negotiate with the information you got in the previous shop!!
If you are looking for shops that Dominicans shop in, try Casa Nelson which is just off the Central Park on Saperacion!! There ain't no such animal as a Shopping MALL in Puerto Plata, you have to walk the shops for your style of requirements!! - Grahame.