Can't do more than one thing at a time??

[#1]

Hello,
I'm having a problem with my line that, basically, I can only do one thing on it at a time if I am playing an online game.
If I am on a game, and someone opens safari (or anything that uses the internet connection) on ANYTHING, tablet, PC, phone
the game lags out big style. 500+ ping impossible to do anything.
If they were downloading a lot of files, I would expect this. But it is simple browsing on a browser or anything involving the internet.
Gaming can't be done. This is 2015 and i'm stuck with a line worse than 56k that I had so many years ago.
What is going on? How can I fix this?
Thanks

[#2]

Are you using a wired or wireless connection for the machine playing the game ?
When my Stepson uses his XB360 on wireless it tends to slow the rest of us too.

[#3]

No it isn't that. Everything is wired except the tablets.

[#4]

What are your connection rates (up and down?)
You may simply not have enough bandwidth to multi-task without saturating your connection.

[#5]

From the site http://speedtest.btwholesale.com/
Download Speed (Mbps) 13.7
Upload Speed (Mbps) 1.07
Ping Latency (ms) 19.00
Sounds awful, which it is can't believe a new build can't get good internet.
But still, should be able to run more than one thing on it. It costs me £20 a month for this crap.

[#6]

Clifford,
There are many things which could be "at play" here, all far removed from PlusNet's domain.
The first thing to do is to compare your actual service against expectations for your location.  Actual speed is governed by where you live (relative to the exchange) than anything else.
Please read the speed issues thread - see the link below - then gather the requested information and post it back here.  We can then take a look at how things are performing against expectations.  At this juncture looking at DATA SPEED tests is not overly useful - you need to be looking at synch speed and ensuing you have got as much of that with out error as you ought to get on YOUR line.
Is there any noise on the phone line?  Using a corded phone plugged into the master socket, dial 17070 option 2 - is the line silent?
Is the router plugged into the master socket?
Are there any phone extensions?  If yes, how are they wired?
Do you experience this problem all of the time or only at certain times of day?  (For example, only between 5pm and 10pm?).
Kevin