Xperia Z3 :: Ear Speaker Non Functional

So the other day my phone (Xperia Z3) was working perfectly fine. I was able to hear people on phone calls and noise came from that speaker. The next day, the speaker was completely silent when i tried to talk to someone and the only way i could do this was by having speaker phone enabled so it would come out of the other speaker. Now i don't know about you, but it's a bit awkward out in public.
 
Firstly, i have had my screen replaced before, by a third party repairer who i have been to for all other phones, and when i got it back, the ear speaker was distorted if on the maximum volume when listening to music or watching videos, so i never have it on full volume. Unfortunately, because i went to a third party repairer, Vodafone will now have to charge me for the repairs so i want to try as many things as possible before i have to fork out a bunch of money to get it repaired.