Noida builders' hidden charges are basically fraud

Moved into my new 3BHK in Sector 137 last month, and already regretting not digging deeper. Got possession from ACE Group in March, aur hidden charges ne toh budget hila diya. Registry, maintenance deposit, aur kuch random PLC adjustments milake ₹3.5 lakh extra lag gaye! Sales team ne kabhi mention hi nahi kiya tha yeh sab. Also, construction quality... kitchen sink ke paas halka seepage dikh raha hai already, aur tiles mein bhi gaps hain. Socha tha bade builder hain toh thoda better hoga. Not sure if sab builders aise hi karte hain Noida mein, ya mera hi luck kharab hai. Has anyone else faced such massive post-possession surprises, especially with maintenance deposits? Kaisa rehta hai builders ka track record for society maintenance after 2-3 years?