Have you contacted the seller?

What is the item number?

Other members cannot get involved to resolve the issue for you, we can just give you advice

But not without knowing more details

The only seller to leave you feedback recently is in China, and sells some leaf/blower vacuum combos

Although buying cheap and nasty rubbish like a leaf blower/vacuum from China  would be asking for trouble 

We are just members like yourself here, not eBay or your seller.

Contact your seller and explain what's happened.

What is the item number (RHS of the listing page) ?

Edit. Snap yet again Sandy.

Most do both - you switch between vacuuming & blowing. 

Have you tried.

Mind you an item such as this from China could do more than blow. 

The latest seller who left feedback for you has items that are both leaf blowers and vacuums (the listings call them combo or 2 in 1). Are you sure your vacuum can't blow too? I would not buy such items from a seller registered in China though...