Mivi — MIVI Roam 2 Product Issue

Address:

Model Town Kerajhar JSPL, Raigarh (C.G)

I ordered my MIVI Roam 2 Bluetooth speaker on 30th October 2021 and after 3 months the speaker stopped working so I mailed MIVI about the issue and they arranged a pickup for the repair After the repair of the product from MIVI service center I received my MIVI Roam 2 Bluetooth speaker on 5th March 2022 but now the speaker is getting on and also getting connected to device but there is no sound in the speaker. They took 1 month to repair it and now my speaker has no sound. what to do now?
I trusted in the product but it's so disappointing.
And now MIVI is not replying to my mails.
Please help me in this matter