No resolution from Post Office

We have been battling to get resolution and subsequent feedback on a number of items that we have contacted the Post Office with. To date, no resolution on any of these.<br> 1. Parcel sent back by Cresta Post Office almost 3 weeks later after the recipient went to collect the parcel and was advised it had been sent back already when she went to collect it at Cresta.<br> 2. Letter arrived in South Africa according to USPS website and unable to trace this letter in SA<br> 3. No feedback/subsequent feedback with resolution on two damaged parcel enquiry submissions<br> 4. Still no post received at our postal address since our complaint last year September 2014.<br> <br> We phone the call centre and the call gets dropped by the Post Office clerk, no-one answers after a significant amount of time and therefore we are unable to get hold of the relevant person telephonically to resolve the above.<br> <br> We have encountered terrible service with the post office e.g. No feedback, delayed responses, responses with no resolution / action and inappropriate feedback not in relation to matter. <br> <br> Please can a manager investigate the above concerns and provide us with telephonic feedback.