PSIT OFF WITH THIS SHOCKING INCOMPETENCE

Hi i have sent 36 emails, 22 calls and still not received my delivery, they put in the wrong address, when i have had the same address 7 years and never had a problem, now there is one, its 3 weeks now and get the same lies and no delivery. can i speak to a manager or MD, as the service is a disgrace, Your staff is rude, and they uneducated clearly as they do not know what they doing, can some one assist. or pay me back... im pist off now