if you show proof and documented intent that you have contacted contractors/hanyman/women and have not had any results, you could get an extension on that simple task.
I am sure its the paint that has welded the window shut. Patience and a box knife and some sort of fulcum will work the window loose. Too much force will only crack the panes and cause more problems.
Do a local Internet search for Handymen in your City and use this person. Contractors most likely will not afford to come out with something like this.
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