Hi! I checked on the forms and the only form I saw with Undertaking Application is form 1344e Application to Sponsor and Undertaking page 4 of 7 you might missed to validate or something that went wrong here. You can check again the forms u have submitted, I might be wrong. Looks like they are also asking for payslips and evidence/docs related to financial evaluation, im not sure with these as I haven't had these financial evaluation in my own application,. wait for more replies though or if u can call CIC would be your best move