Customers are having trouble getting through after faster payments have been made to Halifax, Lloyds and the Bank of Scotland.
"We are aware that some customers have problems with faster payments," the companies said.
"We strive to resolve the issue as quickly as possible, and we want to reassure our customers that they will not be out of pocket, and we apologize for any inconvenience."
The customers were worried because the phone lines could not connect to the help desk.
"Why can not I reach you by phone? It means it's not possible to make a call?" asked a concerned customer Halifax on Twitter,
"Today we have a higher call volume than usual, which can affect it," the bank responded.
But the bank added that the phones had not failed - just busy.
"Our phones are not inactive, but some of our ports are currently under heavy load," the bank said on Twitter.
How are customers affected?
The main problem is that money is not transferred normally.
"I tried to send money from mine AskLloydsBank three times, the message appears & # 39; could not be processed immediately & # 39 ;, usually appears in seconds, "Nathan asked on Twitter,
Others saw problems with incoming payments.
"What about those of us who need cash receipts, they do not work, and now I'm losing money because of your problem." Halifax customer asked,
Others were stranded after the payments failed to materialize.
"My partner can not go to work because he still has not received the money I sent him for fuel ... so yes ... very much out of pocket!" Rhiannon asked,
The banks said they were working as fast as possible, but could not give time for a repair.
"We are working to solve this ASAP" Said Lloyds,