This is a service provided only by this shop, not the entire departmental store.
This is a service provided by this store only, not the whole of the departmental store.
「デパート」→「Departmental store」
「全体」→「Entire, whole of」
「店舗」→「Shop, stall, store」
「Provided」→「提供」
まとめて言いますと、
「This is a service provided only by this shop, not the entire departmental store.」
「This is a service provided by this store only, not the whole of the departmental store.」
と表現します。
どちらでも使えます。
シンガポール 
