Who is true God?

Kabir Saheb is the only Complete god who seated in human form in the third Ritdhaam (Satlok) of Purna Brahm, which is different from Brahm Lok and ParBrahm Lok. The fourth lok from Satlok is Anami lok,He is also sitting there himself in visible human-like form as Anami Purush 

Lord Kabir Saheb is the only god who came in all the Four Ages for his beloved souls.

In Satyug by the name 'Satsukrit'; 

In Tretayug by name 'Muninder';

In Dwaparyug by the name 'Karunamay', 

and In Kalyug, appeared

by His real name 'Kavir Dev' (Lord Kabir Saheb). 

There are Some of the famous lines of Saint Garibdas Ji are 👇

सतयुग में सतसुकृत कह टेरा, त्रोता नाम मुनिन्द्र मेरा।

द्वापर में करूणामय कहलाया, कलियुग में नाम कबीर धराया।।

चारों युगों में हम पुकारैं, कूक कहैं हम हेल रे।

हीरे मानिक मोती बरसें, ये जग चुगता ढेल रे। 

In satyug, when Kabir Saheb came by the name of sat sukrit some fake sant call him by the name 'vaamdev' because he started giving true spiritual knowledge. And due to this no one paid attention to him at that time. 

In Dwapar Yug when Kabir Saheb appeared

by Karunamay name. At that time a devotee Sudarshan Supach born in Balmik caste had become his disciple. Sudarshan ji only had successfully concluded Pandav’s yagya, which was neither accomplished by anyone even after taking meal by Shri Krishna Ji