There isn't a public info on a certain "hdb responses sort 1k 28" as this isn't a typical HDB identifier. Nevertheless, HDB provides quite a few channels for responses. The principle technique is through the "Produce to Us" e-opinions type around the HDB Web-site. This way lets you submit thoughts https://hdbfeedbackform1k2852852.worldblogged.com/43369064/hdb-feedback-form-1k-28