There are a few things you could try to see if it is Wi-Fi interference causing the problems.
Split the SSID's on the router, this will allow you to give the 2.4GHz and 5GHz network bands different names, so your Wi-Fi devices will then see those two networks separately, you can then try connecting to one or the other to see if one gives a more reliable connection than the other. Doing this in itself won’t fix the problem, but it makes it easier to troubleshoot as you can easily see what device is using what band.
Change the channels that your router broadcasts the Wi-Fi signal on, you can use free smartphone Apps like this to see what channels are being used within range of your smartphone, you can then change your router to use channels that are less congested.
If trying the above makes no difference then it may indicate an issue with the router, the staff here would be able to help with that.
For one of the TalkTalk staff on this community to be able to look into this you will need to update your community profile to include your name, landline telephone number that your TalkTalk service is provided on & an alternative contact number. This will allow them to identify you, and they will then be able to help.
Don't post any personal details in this thread, just add them to your community profile.
The staff here won't be around now until Monday, but they should be able to respond to this post early next week to help.