I am on a Broadband/Landline package with Vodafone and have upgraded to a VDSL modem(using Wifi) about a year ago, thinking this would improve my broadband speed. I have gone from a download speed of about 7mbps on the previous entry level modem to at the most 13mbps with the VDSL. I have also done speed test with Ethernet cable connected with very little difference.
The issue is also my immediate next door neighbours are also with Vodafone, same package and modem change at the same time and their speeds are averaging 20mbps.
I have had numerous communications with Vodafone and they have checked their end of the connection with no problem found. They have logged jobs with Chorus about 3 times with the outcome being Chorus informing me due to high demand in our neighbourhood on the cabinet some customers basically will get a lower broadband speed.
When asked if they would groom the pairs they told me they wouldn't as then someone else would then have slow speed, as I have to endure.  Yet I am expected to continue to pay the full price for my plan as my neighbours and apparently accept almost half the speed they are getting, I find this most unacceptable.
Chorus told me to go back to Vodafone as they are my ISP and Vodafone tell my its Chorus that is responsible for broadband speed. 
Our street (Oak Ave, Paremata), won't have fibre till August this year and I was told by one of the chorus techs that having fibre may still not solve my slow broadband speed.
I am not a technically experienced person so forgive me if I have not used the correct terminology.
I would be grateful for any feedback on this problem.