ByDesign : Multiple account for same customer linking

Hello Experts,

We are creating multiple accounts based on address which are actualy belongs to same company. In system it is treated as separate.

How to link multiple accounts to one account / or set parent - child relation with other accounts.

For e.g.

Main Group = TATA Group (it has other companies / brands)

Child Company= Titan, Fastrack, Tata Truck etc.

Company Branches = Titam Mumbai, Titan Delhi, Tata Truck Gurgaon etc...

We have a challenge linking branches to companies & companies to main group.

Also, big challenge is when tool sold to Titan mumbai get internally shifted by company to other branch Titan Delhi comes to us for repair (we cant create warranty repair as it shows tool belongs to another account)

Please help.

Regards

Vishal Kambare