(c) By downloading and sending the complaints form by registered post to will be using this: Piazzetta Business Plaza, Office Number 4, Floor 2, Ghar il-Lembi Tas-Sliema, Malta. OKX action Once the Complaint is received, we endeavour to investigate and solve complaints promptly. We may request for additional information and shall contact you or your representative via the contact details you have shared through the submitted complaints form.