Indoor Cam Two Way Chat Distorted and Cuts off From Camera Speaker (UK)

I purchased an Indoor Cam from Amazon a couple of months ago (in the UK). Set it up a couple of days ago. All seems to work fine except for the Two Way Chat. It is very distorted from the Camera Speaker and words/sentences are cut short too. The speaker seems to work when the automated voice tells you it is in set up mode etc. I have tried resetting the device, moved it near to my router etc. I have a Ring Doorbell and the two way chat works fine on this. So my internet is fine. Any ideas. I feel I may have a faulty device.