Comet & Dyson - Return or Repair

I had a look at the Comet website - under customer services, faults - and they say that electrical goods they sell come with a minimum 12 months manufacturers guarantee. It also says that they have a 28 day returns policy. However, if the product is faulty, I am sure that you can return it for a refund or demand a replacement.
For vacuums it says to call the manufacturer helpline. For Dyson, the number is 0800 2980298

I would write Comet a letter explaining your situation and demand an immediate refund. Looking at consumer legislation (Sale of Goods Act 1979) say that you reject the purchase and their offer as the machine is faulty and not fit for purpose, and 2 weeks waiting for a repairman is not acceptable. You must demand an immediate refund and inform them of the dates you first demanded a refund so this is in writing.

If you paid by credit card I think you may be able to get your money back via the credit card company. I'm not exactly sure how this works.

Katealpha is correct. The Sale of Goods Act will protect you - see Sale of Goods Act | Consumer Information

Retailers have to be given the opportunity to repair the goods initially, but this should be within a reasonable time and should not cause significant inconvenience to you. This is not the case.

(2)If the buyer requires the seller to repair or replace the goods, the seller must—

(a)repair or, as the case may be, replace the goods within a reasonable time but without causing significant inconvenience to the buyer;

(b)bear any necessary costs incurred in doing so (including in particular the cost of any labour, materials or postage).

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From: Sale of Goods Act 1979 (c. 54)

You should as Katealpha say, write a letter or e-mail, stating that you will rescind the contract unless a replacement is provided or a loan hoover is provided while yours is being repaired. You need to make your circumstance clear and give them seven days.

I hope this helps and let us know how you get on.

Tony

BTW The staff in the store may not know the law

Consumer Credit Act

Oh and with regard to the Consumer Credit Act the credit card company is equally liable if the item cost more than £100. You could go to them, but in practical terms you will get the issue resolved faster if you go to the retailer Comet in the first instance.

The Consumer Credit Act 1974 | Consumer Information
Consumer Credit Act - Your rights and obligations | Consumer Information

You have some protection with Visa debit cards:

Visa Debit Chargeback - The Facts | Consumer Information