I ended up having to chase Aldi CS up this morning (7th Dec.) on the 'phone as I'd had no reply to my last email sent in reply to one of theirs on Thursday 2nd Dec. The outcome of that call this morning - being on the line for over 32 minutes in total - was this CS person agreeing to a 20% partial refund - £29.99. An email to confirm the partial refund, doesn't mention the amount, has just been received.
Additional information regarding getting the 20%:
Initial contact to CS was attempted via the online contact form and failed - 4 times.
Attempted email contact also failed to receive any acknowledgement.
Eventual contact was made via the 0800 number on the web page and responded to by a helpful person although he had difficulty tracing the order number. He then responded to our 'phone conversation by emailing me, giving a case number, so I could send photos of the damage and poor QC.
After responding to that email I received a reply - with another case number!? - from an unknown/unsigned person who stated I had "agreed to keep it for a partial refund of £22.50 but they would add a e-voucher for £5 which was "the most they could offer" after their "investigation". I responded accordingly stating my acceptance of a partial refund was subject to the amount offered and not definite.
I had no reply hence the phone call today and a discussion which led to an agreed 20% - - - I didn't want any e-voucher as I'd have to go and spend it with them.
What a rigmarole... I was tempted to go for the belt sander - now showing as no longer available - but after all this I'm not sure I'd buy from them. If I did it would be after a lot of research here and elsewhere.