I'm trying to use SPServices UpdateListItems() to submit events to a custom calendar list. 

I can submit normal events correctly but recurring events don't save properly. 

     $().SPServices({
                operation: "UpdateListItems",
                async: false,
                batchCmd: command,
                listName: "Events",
                valuepairs: [["Title", $scope.event.title],
                    ["EventDate", moment.utc($scope.event.startDate + $scope.event.startTime, "MM-DD-YYYYh:mm A").toISOString()],
                    ["EndDate", moment.utc($scope.event.stopDate + $scope.event.stopTime, "MM-DD-YYYYh:mm A").toISOString()],
                    ["Location", $scope.event.location ? $scope.event.location.location : ""],
                    ["CTPEventInstructor", $scope.event.instructor ? $scope.event.instructor.name : ""],
                    ["Description", $scope.event.description ? $scope.event.description : ""],
                    ["Category", categorySubmit ? categorySubmit : ""],
                    ["EventAllowRegistration", $scope.event.registrationOpen],
                    ["EventRegistrationLimit", $scope.event.limit],
                    ["EventRegistrationEmail", $scope.event.registerEmail ? $scope.event.registerEmail : ""],
                    ["EventWaitingListEmail", $scope.event.waitingEmail ? $scope.event.waitingEmail : ""],
                    ["EventChangedEmail", $scope.event.changeEmail ? $scope.event.changeEmail : ""],
                    ["EventDeletedEmail", $scope.event.deleteEmail ? $scope.event.deleteEmail : ""],
                    ["RecurrenceData", $scope.recurData],
                    ["fRecurrence", $scope.event.recurring ? 1 : 0]],
                ID: eventId,
                completefunc: function (xData, status) {     window.history.back(-1);
                    }
                    else {
                        alert("Unable to submit your request at this time.");
                    }
                }});

This saves the event but not as recurring.

I'm sending recurrence the recurrence as a string 

    "<recurrence><rule><firstDayOfWeek>su</firstDayOfWeek><repeat><daily dayFrequency="2" /></repeat><repeatInstances>10</repeatInstances></rule></recurrence>"

When I view the event I create on the list itself recurrence is listed as 
<!-- #RENDER FAILED -->

Has anyone ever submitted Recurrence data with SPServices. 

I'm also open to using REST API but am hesitant to because you can't retrieve recurrence data with that.