No doubt you have googled it - This thread reports some success in resolving it:
Also found this on youtube - same brand and different model - NZ user post a video of 'your issue' and dont know how to fix it.
Some responded with "go to, settings, date and time, and disable the second function" - I dont know exactly what that is - but have a look.
It seems to have worked.
Also - is there any chance there are any android updates you might be able to download and install - I would guess that perhaps if wifi is working maybe you could try and access updates - though I see its a cheapie so maybe thats not so likely.