Liams-MacBook-Pro:~ liamfarr$ traceroute www.stuff.co.nz
traceroute: Warning: www.stuff.co.nz has multiple addresses; using 119.224.143.41
traceroute to a1784.g.akamai.net (119.224.143.41), 64 hops max, 52 byte packets
 1  192.168.6.1 (192.168.6.1)  0.710 ms  0.394 ms  0.332 ms
 2  unallocated.maxumdata.net (103.247.154.2)  0.427 ms  0.434 ms  0.397 ms
 3  vl0901.core2.qs220.maxumdata.net (103.247.154.141)  0.585 ms  0.651 ms  0.586 ms
 4  vl0233.edge1.qs220.maxumdata.net (103.247.154.38)  0.645 ms  0.672 ms  0.613 ms
 5  43.243.21.6 (43.243.21.6)  1.580 ms  1.459 ms  1.529 ms
 6  ten-0-1-0-2.cor01.akl05.akl.vocus.net.nz (114.31.202.122)  2.139 ms  2.088 ms  2.294 ms
 7  bundle-10.bdr02.akl05.akl.vocus.net.nz (114.31.202.101)  2.560 ms  2.764 ms  2.314 ms
 8  as4610.cust.bdr02.akl05.akl.vocus.net.nz (175.45.102.66)  24.271 ms  24.166 ms  24.251 ms
 9  pts-n.cpcak4-r1.tranzpeer.net (101.98.5.20)  2.297 ms  2.175 ms  2.254 ms
10  p1.akamai.callplus.net.nz (119.224.143.1)  1.488 ms  1.633 ms  2.441 ms
11  p41.akamai.callplus.net.nz (119.224.143.41)  1.624 ms  2.116 ms  2.334 ms

liam@QS220-EDGE1:~$ show ip bgp 119.224.143.41
BGP routing table entry for 119.224.142.0/23
Paths: (4 available, best #3, table Default-IP-Routing-Table)
  Advertised to non peer-group peers:
  103.247.154.37 103.247.154.42 103.247.154.186 192.203.154.150 2403:4d00:fff:ffff:ffff:ffff:20:2
  45177 4610 9790
    103.247.152.241 from 103.247.152.241 (14.1.32.4)
      Origin IGP, localpref 50, valid, external
      Community: 55785:502
      Extended Community: RT:45177:1117
      Last update: Thu Jul  9 06:37:46 2015
  45177 4610 9790
    103.247.152.213 from 103.247.152.213 (14.1.32.4)
      Origin IGP, localpref 50, valid, external
      Community: 55785:502
      Extended Community: RT:45177:1117
      Last update: Thu Jul  9 06:34:55 2015
  4826 4610 9790
    43.243.21.6 from 43.243.21.1 (43.243.21.1)
      Origin IGP, localpref 100, valid, external, best
      Community: 55785:202
      Last update: Wed Jun 24 04:15:20 2015
  23655 9560 9790
    111.69.34.225 from 111.69.34.225 (43.225.200.2)
      Origin IGP, localpref 90, valid, external
      Community: 55785:302
      Last update: Sat Mar 28 03:36:00 2015

As CallPlus peer on AKL-IX I would have expected to see them advertising their own routes, rather than just advertising these to Vocus who are then 'breaking them'.

Perhaps someone from CallPlus could fix their advertisements, and someone from Vocus could either fix their 'bottleneck' or stop advertising the routes.