I believe you are asking about the office where EPS is located in the Ocean Dream Plaza in Cabarete.
If so, they are still open. I do still use them, mainly for correspondence from the US shipping to me at that office via Miami. For most packages I use TransExpress in Sosua which is less expensive and faster from Miami to the DR than is EPS. No issues with EPS or TranExpress so far. I would not use either for large shipments.
I have shipped a few documents out of the DR using that office in Cabarete since they work with FedEx and UPS, but never shipped any packages. Shipping from the DR is VERY expensive. There is another thread about people using the regular DR mail system, INPOSDOM, for shipments out of the country since the price is quite a bit lower (but reliability is in doubt).