alternator replaced but...
 

i have been having a squealing noise coming form the belt/s for ages and a few days ago the shogun battery went flat, it was a suspected alternator fault but could it have just been the belt.s needed replacing?? anyway we have paid to have the alterator replaced and all seemed ok when we picked the vehicle up the same day, they did a quick job! however the next day the belt is making that noise again and when i had look under the bonnet there is only one belt and i thought they had 2 but cant remember what was on before. now im getting suspicious of the garage as to what they have actualy done for my money. could they have just removed the worn belt which was not working properly and therefor not charging the battery up