BESTWAY Queen Inflatable Mattress 203 X 152 X 23 Cm

The product does not have a built-in pump and I didn't realize... so I would like to exchange it for another more expensive mattress but with a pump included... What should I do??? I know which one I want... can you help me??? I would like to purchase the mattress that I have already placed in the cart. Thank you my mobile phone 919409152 THANK YOU