There is no community information on a specific "hdb suggestions type 1k 28" as this is not a standard HDB identifier. Nevertheless, HDB offers several channels for feedback. The main process is from the "Publish to Us" e-comments type around the HDB website. This manner helps you to post queries https://hdbfeedbackform1k2875296.onzeblog.com/37252670/hdb-feedback-form-1k-28