NEW CELLULAR HISENSE HMV INFINITY H50 ZOOM SPEAKER NOT WORKING

On the 4th May 2021, my hubby who is the account holder for both our cellular phones, went into Vadocom Shop at Greenstone, which he received two Hisense phones. I noticed that already I had problems when speaking and hearing on both the phone and whatsapps, we had gone away from the 7th to 14th May this went on until the 15thMay,. I then decided to take the phone back to the same Vodacom Shop and was told there is a problem with the speaker and would have to go in for repairs. Now apparentlty they are waiting for the repairs. My feelings that my new Hisense needs to be replaced with a new phone and now with the repairs is now a second hand phone. Which i am not happy about