> First of all, I am using the IP address that I am getting from my
> system preferences ( 192.168.0.233).

   Which "the IP address that I am getting from my system preferences"
is that?  Around here, for a wireless connection, System Preferences >
Network shows the computer's _own_ IP address ("IP address").  If you go
from there to Advanced... > TCP/IP, then you should see the computer's
own IP address ("IP address:"), a "Subnet Mask:" (typically
"255.255.255.0"), and a "Router:" address.  Nearby, Advanced... > DNS
should show one or  more "DNS Server:" addresses.  What are all those
data on your MacBook?

>   When I type that into my address
> bar I get the error message:
> This site can't be reached
> 192.168.0.233 refused to connect.

   If you're pointing your web browser at your computer's own IP address
(and you're not running a web server on your computer), then that would
be an expected result.  Note that this error differs from the "not
connected" error reported originally.

   If you point your web browser at the "Router:" address, then you
should reach your router.  (If your computer's IP address is
"192.168.0.233", then my guess for the router's IP address would be
"192.168.0.1".)

> I can do anything online using google chrome on my macbook air.

   Ok.  That suggests that the router is connected to the Internet.
Which wireless SSID did you specify on the MacBook?  Can you see that
SSID on your other devices?  Are you trying to connect to it on them?

> [...] On my phone none of my apps work saying I need to check my
> internet connection, and retry later - or they simply load until they
> time out. [...]

   Did you get these devices to connect wirelessly to the router?

> [...] I've done a factory reset, [...]

   That should reset any wireless credentials (SSID, passphrase) back to
their default values (as shown on the product label).  If your other
devices are still configured to use some customized wireless credentials
(from before the settings reset), then you'd need to re-configure the
router's wireless stuff, or else re-configure the wireless parameters of
the devices.

> [...] I'm not sure how much more detailed about this I can be, [...]

   I do.  Plenty more.  If your MacBook can talk to the Internet, then
it should be able to talk to your router.  (See above.)  

> [...] Our PS4 will simply not connect to the internet.

   When you do _what_?  Clearly, you need to tell the PS4 about your
wireless network.  What information are you giving it?  What information
can you get from the router about its wireless configuration?

> [...] I have no idea why chrome works on my computer.

   I don't know why it wouldn't, but I can't see what you're doing.

> [...] came home and the internet LED light was solid amber again.
> [...]

   You'd need to talk to the router to see what's happening.  I'd work
on that.

   Who's your ISP?  What feeds the router?  What's connected to its
WAN/Internet port?  Does that device have LED indicators which indicate
anything?