"call me at this nomber xxx but with secret nomber.my brother can answer but I don't want to give him explanation"

my try:
bana bu numaran xxx arıyor ama gizli ile numara.benim erkek kardeşim cevap veribiliyor ama ben onu açıklama istemiyorum

thank you for correction

can u explain me why in the first sentence you used double "ile" for gizli and numara.I would like to understand better how we use "ile".this post payed my attention.thank you

thank you very much