Freezer problems. Ok, so my freezer has been having problems completely freezing items. The ice

Question

Ok, so my freezer has been having problems completely freezing items. The ice cream is really soft, juice concentrate is completely unfrozen The ice is frozen but some of the meat like the turkey is kind of soft. About a month ago we defrosted the freezer and that seem to help for about 3 weeks and now it is back to its old self. What do you think the problem is? My landlord says that if it was broken then the ice and meat would not be frozen. But I told him it just could not be working efficiently. Should I have a expert come out and look at it?