the dealer put 10w60 after break in ?!

I got my car from the 2000 km break in service.



Everything was fine , and i asked the guy wich oil they used , and he said 10w60 tws , and i was like hummm ok , since my ex e92 m3 took that OIL.



I got home , and saturday i see on the internet , the oil correct its 5W30 castrol.



Tomorrow BMW will hear news for me , and i want a free oil change.



i did 300 KM´s with 10w60 , there is any problem ? or should i dont get worried ?



Thanks all