Schreiber integrated fridge breaking hinges?

I have a Schreiber integrated fridge, model no. 20012119404, and the door doesn't appear to shut properly, therefore the fridge doesn't get as cold as you would expect. We did replace the hinges once and for a few days the fridge was noticably colder, but after a few days of opening and closing the door it was then accompanied by a squeeking noise and the internal temperature wasn't as cold and there is now some play in the hinges which makes me think they are broken!

I can only think that the door is too heavy for the hinges but they are the ones originally supplied and recommended for the job.
Is this a problem with schreiber fridges and can anyone suggest a solution please?