Very High Ping! 2 Days in a row

[#1]

I online game alot and twice when i've come home its been unplayable because of terribly highping. Download seems to be ok, Abit lower than what I usually get , done a few tracerts for you to see. Hope you can help! From speed test it seems to spike cause every1 test i do I get 38 ms then 150-300. Thanks for any Help
Tracing route to plus.net [212.159.8.2]
over a maximum of 30 hops:
 1    67 ms    99 ms    99 ms  dsldevice.lan [192.168.1.254]
 2   300 ms   278 ms   255 ms  lo0-central3.pcl-ag05.plus.net [195.166.130.36]
 3   273 ms   266 ms   274 ms  gi7-5-531.pcl-gw01.plus.net [84.93.254.65]
 4   275 ms   277 ms   247 ms  po5.ptn-gw01.plus.net [212.159.1.131]
 5   241 ms   212 ms   202 ms  gi3-0.pih-cr1.plus.net [212.159.1.177]
 6   204 ms   218 ms   210 ms  if25.pih-lb04.plus.net [212.159.0.18]
 7   221 ms   209 ms   247 ms  portal.plus.net [212.159.8.2]
Trace complete.

Pinging plus.net [212.159.8.2] with 32 bytes of data:
Reply from 212.159.8.2: bytes=32 time=559ms TTL=250
Reply from 212.159.8.2: bytes=32 time=546ms TTL=250
Reply from 212.159.8.2: bytes=32 time=556ms TTL=250
Reply from 212.159.8.2: bytes=32 time=594ms TTL=250
Ping statistics for 212.159.8.2:
   Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
   Minimum = 546ms, Maximum = 594ms, Average = 563ms
EDIT : Currently no videos/stream buffering at normal rate, whats up >.>

[#2]

So I've just checked my usage, its coming really close to the available amount, the new month start tomorrow, could it be plusnet have reduced it till tomorrow?

[#3]

Depending on your package, your speed will be rate limited.
However, you should have received a warning email that you were close to your limit.
You  may find the link below useful:-
http://www.plus.net/support/broadband/products/res_broadband_faq.shtml#monthlyAllowance