UNACCEPTABLE SERVICE

I went to collect my phone (for the 5th time coming back from repairs or replacements) and i clearing clearly stated that the problem is HARDWARE DAMAGE, i get it back and all that has been done is a software update! the phone still doesnt work properly! The microphone is still \broken"so when i call someone or someone calls me it sounds like to them i am under water. I have not even had this make of phone for a year and i have had to send it back FOR THE 6TH TIME NOW!!!!! i went to collect my phone last week Wednesday (21st October 2015) and i phone in now to find out the store has still not sent my phone to be repaired or anything. This is my SECOND POST about this exact same complaint! I was told on the 1st complaint someone was going to contact me within 24hours! 120 Hours later (5 days) still NOTHING! Secondly"