“Where an arbitration agreement exists, courts will stay their own proceedings and compel the parties to arbitrate: Dormer v. McJannet, 2006 CanLII 42670 (ON SC), [2006] O.J. No. 5106, 35 R.F.L. (6th) 418 (S.C.J.), at paras. 20 and 34; and Puigbonet-Crawford v. Crawford, 2006 CanLII 38881 (ON SC), [2006] O.J. No. 4626, 152 A.C.W.S. (3d) 991 (S.C.J.), at paras. 8, 13 and 14.”