Santander are charging me £110 for going over my overdraft. 
Four £25 charges and two £5 arranged overdraft fee charges.
The £25 charges are for four direct debits they paid when I was over my overdraft.
Phoned them and all they said was they could waver one of the £25 charges.
I refused this and have to call their complaints team tomorrow.
Are they being unreasonable ?

Four £25 charges and two £5 arranged overdraft fee charges.
The £25 charges are for four direct debits they paid when I was over my overdraft.
Phoned them and all they said was they could waver one of the £25 charges.
I refused this and have to call their complaints team tomorrow.
Are they being unreasonable ?