Hi! I dont know if posting in the right post..
I have a problem with CoinBase. I bought Bitcoin with CoinBase and then I sent to a wallet from a platform. I didn´t accept the conditions of the platform so they sent me back the Bitcoin. The problem is they reversed the transaction and sent it to the same address. In CoinBase the address from where I sent is different from the address where I have to receive.
I am waiting for a response for a month from support.... Has anyone had a problem like that? Thanks

I understand that you sent BTC from Coinbase to some other wallet (service) and they sent them back to you at the same address in Coinbase?
If this happened, then you have nothing to worry about. Coinbase is a very solid exchange and if it wasn't some suspicious service (the one that gave you back BTC) then you will definitely get your BTC back.