Poor Customer Service from Sales Department

I submitted a flexi bond application on the 23 November. Automated response was 5 to 7days turnaround time. Followed up again on 30th Nov no feedback. On the 1st December I was asked by the Home Loans department to complete the forms again when all forms were completed and emailed. On the 8 December followed up with again and still no feedback. On the 9 Dec I receive an email stating I completed the incorrect forms. Same days they come back and say ignore as they have found the documents that were emailed to them emailed to Sales Consultant. Received an sms on the 1st stating that the forms were forwarded to the Sales consultant. Consultant advised she didn't receive any forms. No email from Sales consultant or call, I had to follow up once again on the 15th December. I was then told they busy updating profiles and with validation department. On the 17th December I followed up with Sales Consultant again no feedback. Received mail on the 19th December saying referred matter as interest not pulling through correctly. No updated after this. Emailed Sales Consultant on the 24th December gone on leave out of office reply need to email another person. Requested to speak to the Sales Consultant Manager or someone to call me but to no avail. Left serval messages from December to date and no call back on apology. Flexi bond loaded on the 28 December after a month but not correctly done. 3 January i called in and spoke to 3 different ppl that couldnt answer my query. The first person made me hold for 10 mins then put the call down. i emailed the Sales consultant again to give me a call so we can resolve but when he called i was not available and emailed him to give me a call but has not. Very bad service from the sales department as well as superiors. No one call or updates you will anything. You need to keep following up. Gave them an instruction for debit order but still wrong amount is captured. How can I get this resolved if management don't have customer service and dont return call or emails.