Toshiba R50-C-103 Mouse Pad Unresponsive! Help?

Hello, Cody here!
Hope you are all well!

Need some advice asap.

Purchased a laptop from CCL online, delivered next day. This is my 3rd laptop in under 2 months, both previous developed a fault and a crack eve though I've had a Toshiba since 2009 and generally are quite good.

However they stated that they have a 14 day returns policy if faulty, not if I wanted to change for different or a refund. There is an additional charge for a refund or replacement if found not faulty which is £35 + £15 delivery fee.

The laptop is a Toshiba R50-C-103, very good spec and really nice looking home business user laptop and I paid £352 for it.

Because Toshiba have started to sell to businesses only, they have stopped selling to members of the public as of Friday last week the 30th Jan, which means I can no longer get the 3 year warranty for £30 they did for buyers which included collect and return and hardware repairs inc parts and labour.

My problem I now face is, the mouse pad on my current laptop is not scrolling up or down properly. It scrolls if you push really hard but then doesn't do it after a few trys. Toshiba said the hardware seems okay without diagnosing it. The cursor arrow works fine and navigates nicely, but you have to press harder than usual t get a response when clicking something or trying to scroll. The technician in hardware department said use one finger to scroll and use the edges, but still doesn't do it. It is a bit unresponsive in other areas too i.e using scroll bar on right to go down a page, it halts for a few seconds etc

I haven't registered the serial number yet with Toshiba as may want to return it, and upgraded to Windows 10 last night, but problem was before the upgrade as well when it persisted but don't want to return it as it's causing me stress!

What could be the problem, anyone?

Please advise, thanks.